please help, im a noob, snake could be being hurt

ok, so i have a 9month old ball python, eats normal, hides alot but i guess thats normal, but his skin looks very rough and there are like ripples in it, like he hasnt shedded completely, i have the cage at 75 degrees and 50% humidity, can anyone help?

75 in his cold side or the hole tank?

not to be rude but have you read anything about ball python husbantry. you need at least ten more degrees in heat during the day time. 75 should be your low night temp. not to sure on the humidity, anyone else?

Your warm side temps should always be 90-94 degrees and your cool side temps should always be 80-84 degrees. Night drops are not recommended unless you are breeding.

Pictures would help. Thanks!