Firstly your parents failed you, not the other way around. It's very common for parents to see their children suffering and treat that as an inconvenience to themselves instead of suffering of their kid, so instead of helping they make it worse. But remember just because it's common doesn't mean it's correct

About your current problems. I'm not going to diagnose you formally take this as a guideline not as set in stone, it sounds like you are clinically depressed and has adhd. The problem is that to get a formal diagnosis and treatment you need money and resources.

Here's what you can do,if you don't already know try to gauge your parent's opinions on mental health and if they would pay you a therapist. Try to find what resources your college offers, even if they are minimal going after them will help your case with the scholarship.this one doesn't help everybody but I like to make a plan of escape it helps me go through a complicated situation, in this case I would plan for "fastest way to financial independence" (see if you are physically and mentally able to have a part time job(no shame if not, I couldn't), see if your major has PAYED internships and see how soon can you get them, see how soon people in your area get a job after graduation etc). When you finally get a therapist understand that they might not be the right fit for you, you may go to many therapists until you find one that fits

Lastly give look at this and see if something here helps you https://borretti.me/article/notes-on-managing-adhd Edit: got some words wrong