I'm not sure that's in English, but all the same...Every subject is difficult if you struggle with it. Many subjects simply can be overcome by study and hard work. Just watch a 5th grader talk to a 1st grader who is struggling with 1st grade math. "That stuff is easy!" Well, sure it is. You're in 5th grade! Was it easy when you were in 1st grade? Probably not. If you go in a reasonable order, you will always be stretched and you will be leaving a trail of things that are now "easy". Really, it is one of the points of the teaching of mathematics. It is supposed to be difficult, at times, otherwise you don't learn anything.
Pretty big answer for such a small question.