Can anybody show evidence that "nobody is worthless"?

I know I'm worthless. No matter how nice I am to people, no matter how hard I try at work, no matter anything, I'm a failure at everything. My bosses are, at best, ambivalent about my job performance, and are often angry at me for things I tried very hard to do right. I have no friends. Nobody asks me to do friend things.

I tried going to church to make friends. Church is supposed to be a place where you feel welcome. I stuck with it for three years. I did church things, volunteered, tried talking with people. I finally gave up.. I got tired of leaving every service feeling lonely.

Some people *hate* me just because there's something unlikable about me. I'm often surprised by how much hatred there is. One coworker wrote a short story about killing me... when I reported it to my boss she ignored it.

I'm constantly baffled by the simplest things. I am literally the stupidest person I've ever known. I didn't understand basic bathroom hygiene until I was 12. I couldn't spell my own name until I was 13. Supposedly I was "gifted" but I was barely able to graduate high school.

I have never accomplished anything significant that I wanted. I cannot think of any way I've ever made the world a better place. Even worse, I'm a typical fatass American using up resources and leaving waste behind - I don't know how to live any other way.

Sometimes when I say these things people say "the common factor in all these situations is you". Well, yeah! That's my point... in all situations I've been in, the one common factor is that I'm not valued.

So... on what basis should I see any value in myself? Isn't it possible that some of us really are just worthless? I know people want to say that everyone as valuable. but those are just words. Can anybody show any reason I should think of myself any other way?