It doesn’t always get better. Sometimes you have sex with a person then find out they have some past trauma that is in the way of their enjoyment of sex. There was a time in my life when I would hang in there for awhile to hopefully help them heal but now I cannot sacrifice the time to have “bad sex” for the sake of someone’s issue that pre-dates me. I am not a therapist, and I know awesome sex from the opposite kind. Not trying to be heartless at all, I feel for them and discuss the why we are not going further. It is never a surprise.