I think it really escalated when Bleach and Naruto ended and also when DBS went on hiatus or something? But ever since Marineford happened or even Enies Lobby with all the 1v1 matchups, the absolute powerup fiesta and major reveals like monster chopper, diable jambe, asura, the 2 new gears and then Admirals showing haki and use of it to this day we've only seen from Rayleigh and Luffy too I think, its all just been a mess.
Dressrosa had the whole coliseum thing and then we had Law going absolute baller, ham and sicko mode on punk hazard which didnt help too.
But yeah its really ironic how extreme a powerscaling scene OP has. It makes no sense and yet it is a thing, even though it shouldnt be.