I didn't have an issue understanding the "basics of the gameplay", it was really just the controls. General issues were things like pressing shift into z to fire, but aim animation not registering fast enough and getting stuck in a kick animation instead. Or trying to do a slide, but pressing A and getting stuck in a grenade animation.
The hand positioning to cover the keys you need to use is just awkward, so it's easy to press the wrong thing. And in a game where you only get 3 HP and have to kill like 60+ sprinting zombies, that got pretty annoying at times. Especially when one of those key fumbles can make you get hit twice back to back, if it happened when there's too many zombies.
And I don't know why you're doing the whole "git gud" thing. This isn't exactly the type of game people go to for a challenge. I mean part of the goal of playing this is to CHOOSE to die, to find new animations. Being discouraged from dying because that means playing through a "challenging portion" all over again, is well... a little counterproductive.