Just goes to show how hard it is to win as much as Brady did. Mahomes is in the "Pats with Reche Caldwell" phase, though of course he also has Kelce, but Kelce doesn't seem to be quite the player he has been. So Mahomes, with a massive contract, is having to do more with less. Fortunately for him, their defense is really good so he doesn't need to score 30+ in order to win.
But yeah, for a QB used to just ripping up and down the field at will, this is quite a change. If I'm KC, I'm absolutely looking at WR in this coming year's draft.