Monks are op in PvP, they’re the best healer by far. 45 sec cooldown on life cocoon, best mobility of any healer, best throughout and good mana management too. WW monks are really good too.
According to method monks are one of the best tanks and healers for mythic plus. And MW monks are always in the MDI for obvious reasons (crane) WW monks are also very good, they have good utility and are above average when compared to all melee dps for mythic+.
That leaves… raiding. Where BM monks dominate. MW and WW monks are lackluster there (also mw had an OP build for a while) but they can’t really expect their class to be S tier at everything, can they?