Regarding controls, it feels clunky and unresponsive at times and sometimes, the enemies just pile on and you're stunlocked while resisting sometimes doesn't work. Feels like it was a normal platformer it would flow much smoother. There was an attempt at unique platformer turn based mechanics and honestly it feels clunky
Secondly the content. Most things here are static images and implications through text and that's it. You don't really get much action aside from maybe 1 or 2 enemies and maybe 2 endings at best. It doesn't go deep enough for the kind of games it presents. When I look at other similar 2D platformers, I see more enemy actions and variations in poses than in here, which left me disappointed. I acknowledge the efforts put in the game but it just falls short of expectations of something of this genre and the time frame it took for development, which is since mid 2021 as I have seen from one reviewer that stated that on itch.io. What I liked are the kitsune animations both variations, the bondage loss into Satyr futa ending and maybe the Harpy egg curse. Everything else felt weak.
I feel like controls just comes down to a matter of opinion/preferences, as I think I've seen people express both thoughts similar to yours and the opposite on it here. I personally don't mind the controls, and haven't had much difficulties with them that weren't due to me being stupid in some way. Evidently others like you find problems with it or simply don't like it. Not sure what could be changed about them that wouldn't require a full overhaul or rework on the devs part honestly.
As for the content, honestly I can't personally think of any other game quite like Moncurse, in the sense of being a turn based 2d side scroller. Almost every other side scroller I can think of is some sort of metroidvania, platformer, or brawler/action game; which usually means that, regardless of being pixel, 3D or fully animated/drawn sprites, they either have full sprite sex in the world itself, or you have to die/lose in order to fade into a scene( animated or not). And that's not taking into account how few there are that do transformation as well. So I'd say that for what its aiming for and trying to do( which is mostly transformation with some side of sex), it does it well.
I won't say its perfect, and I'd be lying if I said I wouldn't like more scenes or even animations, but knowing that its essentially a 1-man workforce, I'm somewhat fine with the about 2 inworld/map scenes and 1 ending for most of the enemies, and just hope that once the game is mostly finished, the dev will hopefully add a few more per enemy, assuming we don't end up with a bloated amount of enemies that is.