Basically, what happens to most people is bodybuilders and athletes that use steroids sell them on the idea of a “dirty bulk” (which works great when you’re on steroids, but not so much otherwise)… Realistically, your muscle is going to take a certain amount of nutrients, and the spillover is going to fat. There is a range where progress can be made, at the bottom of that range is rapid fat loss and slight, miniscule muscle loss. At the top of that range is maximum muscle gain with slight, barely noticable bodyfat gain. In between is gaining lean muscle with no fat gain, and on the low end is losing pure fat with no muscle loss. Dead center, is what I have been doing, gaining muscle slowly, while losing fat slowly. This range i speak of is the range of carb and kcal cycling. The top is the highest you go, the bottom is the lowest you go (as far as kcal, macros etc…. Anything below the bottom is counterproductive, anything above the top is counterproductive)
What is easiest way to know if you don’t know how to diet properly? You will be stuck on a cycle of bulks and cuts (yo-yo dieting), always chasing that mass you used to have when you were bulking(once cut is finished), and then eventually having to lose all the fat you gained (when you are done bulking).
Admitting you run “dirty bulks” is admitting you don’t know how to bulk clean. You are out of the range where productivity happens, on the upper end.