Abilities and hax. Congrats Garou copies powers, can't copy a Soul Reapers or even Yhwach's. Aizen's Kyoka Suigetsu is flawless, even that scene where Unohana could tell Aizen faked his death was cause Aizen knew she'd noticed so he could reveal to her his true extention, even The Allmighty, the ability to see and change any and all possible futures couldn't show Kyoka Suigetsu's true power or even show it being deactivated also Aizen knows many kidos and doesn't need incantation or even the number, like when he was a lieutenant he blocked a hado 88 from Tessai who was head of kido knowledge and spells, meaning he was best at kido and Aizen just said "Danku" and the spell was blocked easily. I don't even need to bring the Hogyoku into this. Yhwach.....need I explain more, the guy can revive himself, change the future to benefit him in any way, know anything a person is about to do, imagine anything he wants into reality, turn into anyone, have their memories, powers and copy their personality, make anything (including the air) poisonous with him being able to make an antidote, evolve and adapt to any situation, and so many more op powers. Ichigo has hollow mask, cero, Getsuga Tenshou, some quincy powers, his own fullbringer powers, and soul reaper powers. Not to mention his true bankai was so powerful Yhwach had to destroy it, simply out of fear.
@blackskull141 it's mostly galaxy level since people take multiple stars and say their universes without doing actual simple resrarch.. Like the dumbest thing I've been hearing is saying Saitama destroyed those universes when their freaking stars. Like if it was a universe then only God remains and Saitama dead along with the universe.
@greenbeedrill888 the fight between him and Sitama did destroy a few stars and I believe a galaxy (could be wrong, that why below I sealed him to around galaxy)