The title fits this game very well...

the single spikes (the one on the floor and the one on the ceiling in the pattern with the gap) hitboxes are far too big on the right side, every single jump requires almost pixel perfect inputs (and by almost i mean like a few frames window) and your jump doesn't come out half the time after landing from mid-air (be it after jumping or falling from a ledge)
also sometimes when i jump it somehow jumps forward for some reason. not sure why

i feel like this isn't a case of the game being hard so much as "it requires inputs more demanding than what you can perform with the available controls".
the fact that i have to mash left click just to triple jump in time, and even that doesn't guarantee that my jump comes out, should be enough of a statement.

edit: after miserably dying on 19 at attempt 981 because my jump didn't come out, i've finally scored 20 on attempt 1127;
though in exchange both my eyesight and sanity have considerably worsened

Wtf too hard men, the jumps are too short lol infuriating game

Over a thousand attempts, but I did it! 21!

Impossibru !