Go into any gym anywhere in the world and watch what the biggest, most muscular guy is doing. There's a 90% chance he'll be doing some sort of bro-split where he trains one or two muscles with a lot of volume, rests the muscle for about a week, then does it again. Most aesthetic gym bros don't know what the fuck RPE, RER, proximity to failure, deloads, frequency or periodization means. They just bust their ass consistently, progress when they can, and eat a good diet.
Building muscle isn't complicated, as evidenced by how many jacked retards you find in gyms. You don't need to torture yourself by agonizing over minute details about "optimal" routines and exercises. It's just paralysis by analysis; stop obsessing over the minutiae rather than just consistently doing the basics