STOP.
You are trying to convince yourself to believe a bunch of CRAP.
Stop comparing your pain to other people's. Some people deal well with some stuff, and some don't. It does NOT make you worthless. My T told me that a person's pain and problems are their own, and they can't be compared to anyone else's because then you're devaluing the person. I'm not going to let you do that.
You're not taking up anyone's time here, not mine, not anyone's. People CHOOSE to communicate with you, and spend time with you. That means they care about you.
You have worth - it's just a bit low at the moment. Or maybe this is a fairly constant state (feeling worthless), then welcome to the club.
You are not stupid, and you are not anything you've said in this post.
I'm sorry I'm so confrontational, but I really identified with your post and nobody deserves to feel like that.
Take care of YOU. You are important, especially to people here on PC.