Being rejected constantly make me want to give up in life

I used to have high hopes and dreams, but reality crushed me. I always get rejected socially. I got cut from sports in high school. Every social group rejects me, and no one wants to befriend me. In college, I couldn't even get invited to a party because everyone thought I was weird. It is so tough to understand why people appear to be nice on the surface before rejecting and backstabbing you. Even the military recently disqualified me for medical. All of this took a massive toll on me.

At this point, I just want to live with my parents and play video games all day. I don't have any hope anymore, and I can't keep trying and getting hurt in the process. If I hadn't been rejected so much before, maybe I still would have the energy to try hard in life. But I don't anymore.