It might seem like with Pit owners but it is really with all dogs. Especially working breeds. Border Collies and Malinois end up in rescue with problems because their owners got them without knowing how to take care of them. All the time and energy they require.
I will say this is a very good post! I think you covered most of it. For each dog it can be different on what stresses them out. For instance one might hate a kennel but enjoy running on a chain. So that could cause them to be in distress and not content when outdoors, which leads to them acting out - barking, digging, destructive chewing, escaping.
I'm pretty much just going over what you did and maybe adding here and there.
Lack of attention - Dogs are social being, APBTs get very attached to their family and thrive on human attention. There are atypical ones which could care less but many enjoy the devotion of their people. They need praise, play, training, walking, all these things that help you bond with them and make them well behaved/well adjusted.
Crated too long - Some dogs get along ok when in crates for long periods of time, even though it isn't too fair to them. Others become very bored and frustrated. They might eventually get out and do damage on your stuff. Other times when let out they are way too hyper, high strung, nippy, don't listen, ect but its because they have an over abundance of energy and have had no outlet all day. If the dog were not crated almost 24/7 the dog would be much more calm, obedient and well adjusted. This isn't to say a hyper dog isn't going to run around and play a lot, but it will be totally differently the dog is manageable. You'll also need to give a dog like that more excercise. You'll have to put effort into walking/playing with the dog.
Isolated in other fashions can produce the same results and can also lead to fear and under socialization. Like dogs kept in a room or basement that hardly ever get out. They can have an array of behavior or temperament problems.
I think being inside too much as well. Dogs need exercise and outside time. Most people are not happy being cooped up in the house all the time. I realize dogs are not people but they still need activity in their daily lives. I know it varies from dog to dog but people need to do whats best for their individual dog. I really don't think its takes too much sense to realize what makes them happy. They need walks, play and even outdoor alone time for those who like it. Some don't want to be outside by themselves, only if you are walking them or using the flirtpole, ect others even if they have already done that with them would rather say outside alone for a bit then go back inside even if you are going in. If the dog is going to be outside by themselves provisions need to be made to make sure they can't/won't escape.
Lack of exercise is such a big one. Especially with working breeds. I have one that I can really never seem to tire out, she will calm down somewhat but she would keep going if she could. Being that it is winter hear and there isn't much we can do I see that its taking an effect on her being more hyper in the house. If she were never exercised or confined all day she'd be a total wreck. She already gets stir crazy as it is. We do walks and drag weight on the warmer days and on the frigid days we have to mostly stay inside. But she can still run after a ball, play with the other dogs, and yes I use the flirtpole inside with her about 30mins every night. If she didn't get this energy out she'd be a terror. She responds much better to training and is more content when she gets more exercise and play.
Health reasons is one that usually goes unnoticed but it has been noted that bad behavior can be linked to them. Especially if their seems to be a sudden change in temperament, if nothing else has changed (like the dogs living situation, exercise or other routine) then I'd suspect an under lying medical problem.
Scolded too much or not enough praise, I never really thought about that but its probably true like with children. I mean I know being too hard on the dog all the time is just going to produce negative effects and the dog still won't make you happy if you ruin it. The way you put it sounds good.
I think being destructive/chewing can be a sign but we should also remember that some dogs do this for fun with being bored. Even if they get the right amount of attention, training and exercise some just like to destroy whatever they can. It is fun and entertaining for them and they are not acting out, just like some dogs like to roll around balls/food bowls their muzzle/feet, or toss the rope toys around for themselves or pop balls out of their mouths and chase them some n the other hand like to chew and rip everything up with that intent from the get go.
For the symptoms I would also add barks a lot. Bored dogs often bark, especially when outside too much and ignored. They will do it though in the house too if they don't get enough attention, some people get complaints again them about their dogs barking when they are at work and their dog is inside bored and alone. Also stress dogs will bark for whatever reason they are stressed, whether it is boredom or another reason.
Disobedience is probably another one, like tuning you out. Even if they are trained and no what you are saying if the dog isn't getting attention/exercise regularly they might just start doing what they want without regard to you telling them no, stop, down.
Scratching/licking/biting as themselves is another sign too. The dog is in emotional distress usually due too much time in isolation. They start to become self destructive, some obsessive licking wounds they've created. Or even causing soreness/wounds from all the licking and "digging" (like when they have allergies or fleas they "dig" with their front teeth type thing) and they keep doing it making it worse.
Jumping or nipping too. Not in aggression just out of being "overloaded" some high strung young dogs that haven't had a good structure in training and exercise might be nippy/grabby, most pups grow out of this and you can discourage them from doing it but when they haven't had that proper treatment they keep doing it even though they are older. Especially if they are mostly ignored and the person goes to give them attention they are besides themselves and will nip in the play/excitement. The same with jumping, they are overly excited and just want to be all over the person and can leave some pretty nasty scratch marks.
Some also nip out of insecurity. Having to do with how they've been raised and what their temperament is like to begin with. This again isn't aggression but they don't want the person to go/leave. They grab them for attention. Some of it can be dominance related too when they are demanding attention as well. I find that mostly in other breeds and not Pits though, those other breeds also bump you, muzzle you and things for attention. Some Pits that have separation anxiety will bark when you leave them alone, scream and freak out if you walk away and they can't get too you, follow you around no matter what and grab you if think you are going to leave them. This type of behavior can be fix with some patience, modification and the proper kind of attention and exercise in a daily routine. Some people make it worse though because they either allow the dog to be glued at their hip 24/7 so they don't have to fix the problem or just decide to isolate them instead thinking they will "get over it" on their own.
