Yeah this post highlights my main gripes with M+ as a system. The difficulty is coming from the timer, not the key level, and there is ALWAYS a better player. Whether you get to play the content or not is literally out of your hands, even if you push your own key what you get to do is literally random. You just hope you are the most qualified looking X to apply. Add on top of that class/job balance being different in a dungeon group size than a raid group size and an infinite gear treadmill and you get an actual nightmare. My suggestion to people who want infinite power progression and dungeon speedrunning is to go play the game with that design philosophy and stop trying to make every video game the same video game.