My Western Hognose is Worrying Me

From all that I've read and researched about hognoses, they seem to be one of the most docile snakes in the pet trade. I hadn't discovered them in person until I found a breeder at a convention with one hognose snake left. He was juvenile, seemed to be very well fed, and was actively trying to dig and burrow in the little cup he was put in for display. He was healthy enough to spend the money on, and ever since I've had nothing but trouble. All he does it go through binging and starving periods. He bluffs and hisses at his food and won't eat it unless it's at the crack of dawn. He's escaped before because I didn't have locks on my sliding lid (which was my own mistake) and he pushed it off by putting the turned up scale on his nose into the screen and shoving it aside. He's dug through the screen with his nose and has left giant holes in it (but we find them now and fix them before he can eacape). He sits on top of the thermometer and wraps his tail around it and picks at the screen when nobody's watching him. When he wants out he refuses to be picked up. He has to crawl out on his own otherwise he hisses and bluffs and plays dead if you put your hand in, OR he bites because he automatically assumes anything that goes in his enclosure is food. He's perfectly docile once he comes out of his terrarium and will burrow into your body and doesn't mind to be picked up whatsoever. He'll even come towards you and burrow in your lap.

He's obviously unhappy and wants to escape. My boyfriend and I were debating on what is making him so miserable. He's in a 30 gallon breeder (which some say is too big), but we don't think that's the entire problem. We also live on a second floor apartment where there's a lot of walking upstairs and air conditioners blasting and people yelling. I know they're very sensitive to vibrations. We're moving into a quiet rural house in a couple weeks and are thinking this might solve some of his behavioral problems.

I just worry about him because he seems stressed out and won't eat half the time he's offered. He doesn't look much skinnier but he's growing longer and I'm worried it's just not enough for him. I also am sick of him biting me. Every time he does he won't let go and I worry it's just making him worse. But if I don't handle him at all he gets scared of me and strikes at the glass every time I walk by his tank and plays dead which makes it even worse for him, so at least if he bites me and gets over it he's not so terrified. He's finally starting to learn I'm not a threat but he still hates his territory being encroached upon.

If anyone has any suggestions, or thinks he'll get better when we move, let me know. I'm hoping he'll start eating normally. He still won't take adult mice and when I try to feed him adults he goes on a fast for over a month. He only eats fuzzies and he won't eat more than one every two weeks. It's not enough. He used to eat one twice a week and that's when he was much smaller. I'm worried about him. If there's anything I'm doing wrong or anything I can fix I'd appreciate any advice anybody has for me.