What end game content? I understand that influx of dopamine-starved wow players would lead to a topic like this, but if you're looking for endgame content to keep you glued to a screen 24/7, maybe think about going back to wow, or try PoE or any other game that's focused on wasting your time in exchange for your cash.
I hope someone, somewhere during this thread posted that infamous picture of YoshiP telling you to take a break for a game if you're bored. Because that's the core of this game. Play it, enjoy it, walk away till next patch if you're bored. What do you miss some much? World quests? Pointless weekly mythic dungeon grinds? Pulling the lever every tuesday like a good pavlov's doggie? Because if that's the case - WoW still exists. Still covers that dopamine-junkie niche.
But if you came here, please make sure to respect the rules of our monastery and enjoy tranquil existence between patches. Learn to build a zen garden.