You just have to keep practicing and persevering!
Watch the video: https://www.khanacademy.org/youcanlearnanything?video=main&utm_source=Sailthru&utm_medium=email&utm_term=YCLA%20Clicks&utm_campaign=YCLA%20Ph2%20Follow%20up%20email%20082214
If math is hard for you, you should consider taking some math helping electives or even just keep studying on your own what works best for you.
Math is so hard because you have to think. And you need to use your brain too. You have to recheck your math problem to see if it's correct, etc. Yes, you are right. Math was even hard for the genius Albert. Einstein.