Now that I understand, bro, you have to do what he does in the video to defeat him, hold the block and towards the end of his blows you let go, and do this tactic, I'll do that too
Dawg i swear they ga remove some of the health on the 2nd phase i got on hit box when my moves hit i dont do damage or he just cancels it this boss is rigged
i just did something that i think is a bug, apparently you can bug the retry button and it nevers make you retry so i could fight sukuna with inf lives
my tip for anyone trying to defeat him is just to dodge Fuuga by hiding behind the skull and remember he ALWAYS does the x slash after the running thingy. just wait for him to do the running thingy, hold block, get near him when he starts the dismantle combo and parry the x slash then do whatever combo u like. i did 4 m1s when my skills (bf and barrage) were on cd but the full combo would be m1, m1, m1, e, t, m1, m1, m1 dont use y cuz it takes too long and he might recover. when he hasnt used the running thingy just run, dash, and jump until he uses it and wait for the x slash. fuck this nigga honestly hes too unfair.
Biggest thing for me was: 1. Dodge fuuga (fire arrow) either by sidestepping or hiding behind an obstacle. 2. Get in close and parry his second move (release block just before the final X pattern slash), afterwards go in as soon as possible with 3 x M1's (i tried opening with other skills but he just dodges instantly), and the combo goes like this: 3x M1'S + E + 4x T + Y (y is important at the end so it gives you space to escape). 3. Keep running away until he starts another fuuga, repeat.
Big tip! If you are running Roblox at an extremely high framerate Sukuna can be more wild and unpredictable. I ran Sukuna at 120fps and continuously died without ever seeing in healthbar on the screen, I then turned down my frame rate to 60fps and then beat him in 2 tries.