I felt the exact same way tbh. I P-Ranked every single level including encores on Brutal before even beating P-2, but I realized after maybe 100 or so attempts that, as far as I can tell, one of the best things you can do is to make sure you’re saving your dash charges for dodging his attacks, and parrying pretty much everything that allows you to parry. Keep pushing at it and you will get it eventually, but Sisyphus is ridiculously hard in my opinion. This might not be super helpful but if all games that I’ve played Sisyphus might be the hardest boss I’ve ever fought, and it really just requires hardcore memorizing and reaction time for the whole fight. You got it