how in the fuck do i beat NKG when the whole fight is practically unplayable?

the fight itself is ridiculously hard, with everything doing 2 damage, and 2 notches gone (which also screwed my pogoes up because i was so used to longnail +pride) on a already extremely hard fight, and a bullet hell section that also does 2 damage. but all of that could be overcome by the "git gud" strategy. my main issue is that the fight is borderline unplayable. at the lowest resolution possible, no mods, and lowest possible graphic settings, im running at sub 40 fps. and during any attack with a lot of particles, it drops to 10 FPS! like, how in the actual fuck do i fight a boss like that!? and on top of that, there are non game issues, like MY KEYBOARD DISCONNECTING EVERY OTHER 10 FUCKING SECONDS! should i just cheat? because as of now, it seems quite literally impossible.