Cat out of control

[Zorro21]

My boyfriend and I found a cat in July. It was abandoned and no one claimed it. It had been left on the street for at least a month. I brought him to the vet and the vet estimated he was about one year old and he was not fixed. In fact, one of his testicles had not descended. I got him fixed and fixed the testicle issues.
The cat lives with my boyfriend because I cannot take in anymore cats at my place (I have three cats; one of who is quite old).
Long story short, the cat is very badly behaved. He jumps literally into the fridge whenever we open it. He jumps on us as we eat. No matter what we do he will not leave us alone. We have tried to tell him no, we have tried to spray him with a squirt gun, we bought a SCCAT (but can't very well put in the frige nor on the kitchen table when we are eating).
To make matters worse, he bites. He's never broken our skin. However, he'll attempt to bite us whenever we pick him up. He'll jump up on us and be affectionate and will suddenly just wrap his paws on our arms and then bite. I've again tried to discipline him and we are getting better at seeing when he will bite (tail wagging, ears back) but I'm tired of his biting. Whenever I pick him up he does seem very anxious and his heart is beating very quickly. He chews the carpet, he chews the lamp shades and he'll chew anything (plastic tupperware). He is completely obsessed with food and will run into the pantry whenever we open it so that he can jump on the shelf and completely destroy the food bag.
I love cats. I've owned several cats and never have I had to deal with such a multitude of issues. I frankly don't know what else to do.
He is left in the apartment for long hours when my boyfriend goes to work. The apartment is 5 1/2 room apartment so he doesn't have that much space to run around.
I'm at the point where I think I need to try and get him adopted from someone else. However, I live in Montreal which a city that is filled with abandoned cats and most of the non-kill shelters are filled.
Any advice? Do you think he would be better placed in home with more cats? or a bigger house?
ANY help would be greatly appreciated.