What do you do when everything seems impossible to you, even small things such as copy paste?

You should ask a doctor. There are a wide range of possibilities involved. It could be something as simple as making a.change of diet, but it could be something more complicated.
You need a doctor to help you sort it out.

People achieve “the impossible dream” daily. But I can imagine nothing more demoralizing than to be deprived of the satisfaction accompanying the fulfillment of one’s dreams and desires. The urgent requirement inherent with Patty Melt’s advice cannot be overemphasized.

You have asked a number of questions that indicate that you have some serious areas of discontent and feelings of inadequacy in your life. If at all possible, I would suggest you go for some counseling. I think it would help you feel haapier and mote in control of your life.

I take a nap. If I felt that way later, I’d see a doctor or psychiatrist or shamanic practioner or something.

@janbb I don’t have feelings of inadequacy in my life at all.Rather,I am trying to get the best out of my fucked up life with the limited resources which I have.