Three. Perfectionism about khushu

This one deserves care, because it drives people out of prayer altogether.

The reasoning goes: I felt nothing, so the prayer was worthless, so what is the point. And then a prayer is missed, and then a week is missed.

Whether presence of heart is a condition of a prayer being valid or a condition of it being complete and rewarded is a fiqh question, and the schools have a dominant answer to it. It is not a question this platform will answer for you, and it is exactly the question to take to a scholar you trust, once, and then stop turning over. It is worth asking. A lot of people are one answer away from praying again.