Why does it feel like people are always trying to make me feel inferior?

I don't know if it's that i'm overly sensitive but i've felt for a while that people always seem to try and make me feel inferior. It has affected my self-esteem a great deal. I feel that i'm incapable of ANYTHING. I can't see myself ever achieving anything at all. I battle with major depression and anxiety and somehow i feel that the people who are aware of this are the ones who contribute most to me feeling bad about myself. The littlest things people tell me will get to me and it affects my mood for hours or days. I just don't know what to do. Do i overthink things?