People that like math (subject at school) of reddit, why and how?

This is not a blanket rule, but I would say that generally, enjoyment of math is directly proportional to effort. If you put in the effort to learn and memorise formulas, concepts identities etc, math is beautiful. If you don’t, it would be a very unpleasant subject.

My suggestion- start at the beginning of the chapter you are working through in class and do every single question in the chapter. both the examples and the excercises. Then when you are done, go back and do it again. Do that for a few weeks and you will love math.