Ok, but like... You could be having the experience you want if you plugged your current controller into a computer (not even a particularly high powered one for this game), spent an hour or two messing around with it, and if you struggle with the modding process people would help you? I've found a mod that does exactly what you want on nexus mods, it changes the game speed on the fly
I'm not being elitist when I say you can't make a game for everyone... You literally cannot. You can't be the same handful of people who spent 7 years polishing every aspect of a game to tune it just right, then also keep track of a granular set of difficulty sliders throughout the process. These are incompatible design philosophies, you can't make a game like Silksong like that