Did you guys want Luffy to beat Kaido in round 2 or 3 itself? Then you guys would've been complaining about a lack of struggle, Oda rushing things, Kaido being underwhelming etc.
Oda is showing what it means to not only fight a Yonko, but the most powerful character in One Piece right now. I think it's entirely fine that Luffy has struggled so much and taken this many Ls against the World's Strongest Creature. It'll make that win at the very end all the more satisfying.