Feeling like a failure

So when I first went to college I only did for 3 weeks which I've explained why before, because of it being all too much and couldn't keep up in  a 4 year college. few months later I decided to do community college which has been working out a lot better, but i have no confidence what so ever. When we were applying and stuff my dad at first said that he wouldn't pay for it because he thought I was a quiter and quit everything and then i said how much that hurt and he's now paying for it. But ever since that happened, I feel like nothing I ever do is going to be good enough, my mom and my step-dad i feel are the only ones that truely believe that I can do it. My high school also played a part in me feeling like this because they said they didn't think I could graduate from high school in my IEP meetings and never gave me homework through my 4 years of high school because they didn't think I could graduate and now I struggle with a homework load because of this and I blame my high school a lot and I just feel like I won't succeed at anything and don't even know why I try anymore I feel like people expect me to fail because of having trouble with anxiety and learning disability wise at sometimes.