He was the one that made the powerscaling as absurd as it was. Doflamingo should never have been more powerful than Lucci + Enel + Crocodile combined and Katakuri should have never been 5 times more powerful than that and Kaidou should have never been 20 times more powerful than even that. There's no reason for it other than to keep justifying these retarded new haki power up ass pulls.