I think everything I say is wrong and everything I do is wrong
I am sorry to hear that. What has been going on to make you feel that way?
I have been constantly criticized by everyone I know. When being with friends, they critique you on whatever you say or whatever you do (even if it makes them seem pretentious and crass in their words and in how they look in certain situations).
It's understandable to be really critical on yourself at times. You should try to think positively about yourself and not judge yourself too harshly, you should focus on the good things about yourself and work on improving the things that need work. Continuing the judge yourself harshly will only make you feel worse about yourself.
I just want people to stop critiquing me. I don't know what to do with it!
It is normal to feel overwhelmed sometimes. Maybe you can find some time away to yourself soon.