When my boss called me 4 nights in a row at 3 AM where I had to get up at 6 to go to school, and forcing me to work 25-30 hours a week when the contract said approximately 15.

What a sadistic bastard!

Sounds like a meeting about boundaries is in order.

Lol you have to set boundaries. One client of mine once called me at 3am. I did not answer the phone, then he wrote me like 5 emails. Next day I called him in the morning, really annoyed and rejected all the work. He payed all the work already done, even apologized, but I refused to work with him anymore. You should do the same :)

I don't work there any longer.
He called me because a shitty piece of software he bought only worked 8/24 hours a day.
They had clients using their servers for illegal shit, so the company shut down.