Sucked. Past tense. 1dnd monk is awesome. And, to be fair, past monks in previous editions have all just been piles of abilities with no real thought put into how the games work.The 5e Monk sucks because it's not a proper translation, it's just a bunch of features that past monks had piled onto a 5e class with no real thought put into how 5e works or how they synergize together.
"Proper translation" implies that there's some uber-monk archetype out there, and there just isn't outside of some old Kung Fu show reruns. That's the core inspiration of the class.
EDIT - as far as I'm aware, all the monks across every edition have been... questionable quality from the very beginning. 2014 5e monk, 4e monk wasn't great, 3.x monk wasn't, 2e ... hasn't been played by me, but haven't heard anything good either.