If you want to achieve some happiness, you gotta try to find the inner peace... you cannot really say you "tried everything"... there are other routes than the conventional ones... and in the end, it's all you who has to do all the work.

somebody mentioned ADHD... that person may not be able to "think normally" but you can make ADHD work.

You can work around other disorders too... surely, you may want to find a low stress job and make accomodations... sometimes you have to change the goals... but as long as you are satisfied and content... it works.

I think there is only tiny percentage of people who can't change... the others can. But they have to do it themselves and that is where lots us give up.