39 and can't hold down a job in anything?

Hey I'm 39 yo male and my work history is terrible. I'm looking at everyone else my age and they are all well progressed into their careers. I go from 1 disaster to the next. I even went back to uni at 23 and trained as a teacher but after qualifying I was terrible at it and left.

I am at the stage where i feel ill at the thought of going to work,any work. I despise it. I've left so many jobs through been sacked or leaving before I got sacked. I make a mess of everything I touch. Nothing sinks in and I fuck up.

I was working as a forklift driver in my current job and hit so many things that on Thursday I smashed it and simply walked off site and resigned. I just cracked. I've no pension or anything. I'm so angry and bitter over my lifetime of failure and I've achieved nothing. I envy those who hold down jobs and progess. Do you think some people just aren't cut out for work?