It doesn’t sound like the problem is the school. It sounds more like depression. School is very challenging and stressful, and it can create and/or flare-up existing depression regardless of which school you go to. Transferring schools is rarely a solution, unless there’s something more severe affecting your grades or ability to cope with day-to-day things. In that case, you would probably need some support from parents and family.
If it’s about school atmosphere, then transferring would probably just compound the problem. Depression always follows you around. You would not only STILL have depression, you would have the stress of moving, retaking classes, and financial aid limits to deal with.
I recommend going to the health center to get the depression treated, if it’s not already being treated. Depression is tricky, because you have to constantly find the courage to BE happy. Otherwise the illness will try to do it for you. That’s when bad things happen.
I think you’re in a good place right now and you don’t have much time left in school. You’ve got a bright career ahead of you. Keep it up. You’re doing great!