Anxiety of being not enough

I've been feeling down lately, I feel I do nothing right and that I'm constantly bothering and disappointing everyone. I've got a new job recently, it's my first job but people has been really mean and I don't like it, but I'm afraid I give up too soon, it makes me feel weak and sad. I doubt myself all the time because I'm never good enough. I had this entrepreneur project with my friends, we worked with it for a year but thing stopped working and yesterday we decided to put it on hold indefinitely. I lost that job and i really don't like the one that I have now. But I need it more than ever. I don't know what to do because I was going to quit but I feel like I can't now.