Hey there 

I really hate myself for everything I do. 
It doesn't matter what I said or did I always think about my behavior afterwards and conclude that I'm a very very bad person who did everything wrong.

I hate myself so much for that and think about social isolation to avoid such situations afterwards.
I overthink the whole time and imagine situations, but my behaviour and the general situations are probably distorted in my mind. These distortions almost kill me inside and I want to hurt myself.
I'm already in psychological treatment.

Do you know this problems or do you have any advice for me to handle it?