Gym Split and Sets

[user472837]

I think that I am stuck my arms don’t grow for months and I will change split from pplpp I will do ppl upper lower and because I do many exercises so it is a lot of volume I will stop doing some exercises and maybe drop the sets from 3 to 2 like for chest I do 30 sets weekly and for back 36 also for shoulders 18 , for triceps 18 and for biceps/ brachialis total 24 . What should I do please give me suggestions ! Arms haven’t grown in months and I am stuck in the weights