Honestly ever since they added mythic + the game has been a threadmill nightmare to gear and optimize for raids, and its even worst if you have the bad idea to take a break and fall behind on both rio and gear ilevel.
I really miss WoD for how gearing worked (not for the lack of content though). At least there was a clear path from ungeared to mythic and it didn t take forever to catch up, even via pick up groups.