Well i got a glitch that the boss was just not using its attack's so i just stayed away from him and i just kept hitting him with the blaster attack which thats what i call it.
Tip: when he gets stun hit him with scythe once then switch to knifes hit him few times and then switch to scythe hit him once and just repeat the same process to do a lot of dmg
U can try to go as far away as possible when he does the jetpack, then once he does the dash attack use jetpack and then teleport. Once u did that make sure to run away from the toilet paper and spam blaster to deflect the big ball
If this doesn't work try uh idk Tip 1: the tip in the video Tip 2: uhhh don't jump too early like in the video Tip 3: when he is below 1500 hp don't melee him Tip 4: get him to around 1510 hp then stun him and start spamming That's all. Yeah I'll have to update this