Nobody likes me and I don't think they ever will, what should I do?

I used to be really nice, all I did was try to show interest and be friendly and people hated me. I don't know what I was doing wrong because I wasn't able to develop normally, and people are too stupid and cowardly to tell me. I hate it. Now I just treat everyone bad, and of course they hate me for that too. But, I'm sick of being a piece of shit with no value to others. I think I'm just going to give up. Any ideas?
Nobody likes me and I don't think they ever will, what should I do?
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