Martial class with a d8 as a hitdice, MAD (Multiple Ability Score Dependant) as fuck, rather low AC compared to true martials due to no shields, and naturally strained in the action economy. Also naturally bad ranged options since martial arts does not trigger on throwing weapons, so they just throw 1d4+3 instead of 1d6+3 or 1d8+3 as compared to fighters.
Stunning Strike is really good and Ki often gets overlooked. Missile Snaring is good. Evasion is good. But I don't think it brings enough to the table to make the monk a good class.
As a DM, the most player deaths in a class I had were easily monks. Melee Rogues before level 5 die quite often aswell, so that is not necessarily a metric of power, as rogues are very powerfull early game.
Overall I don't think Monks have enough good to outweigh their drawbacks. They could have a d10 as a hitdice and would be a lot better, and they still would be worse than fighters.
I think they are about the same as the Barbarian (on which I am not very high overall) among the worst martials in the game.
Quite fun to play however. Ki on short rest with stuff like step of the wind means you get to use special abilities quite often, usually even out of combat if the DM is a bit generous.
As a DM I let players get away with quite a lot of creative maneuvers out of combat if they want to burn a KI for it, because it at least consumes a ressource. As such I like monks on my table.