Yea but he hasn't been given the same time either.
Now I doubt GB is intended to be stronger than Kaidou anyway, and the chapters not out yet, but based off this summary and GB's 3 chapter run he has handled the scabbards, yamato etc. objectively better than Kaidou did the first couple chapters into his fights.
Pound for pound GB featwise right now is arguably more impressive than Kaidou, BM isn't even debatable at this point, I almost (emphasis on almost) feel sorry for her fans.