My point was Kaidou was stronger in the haki department than Luffy was, or he should have been given his experience and strength. All that is cool and all, but at the end of the day what matters is what the sum of all your parts result in. Bajrang Gun was above what Kaidou could dish out, sure having CoC helped but it's not like Luffy's CoC needed to be stronger than Kaidou's, the reverse was probably true actually (which is my point with Shanks and Mihawk).
Big Mom has everything you can ask for, and the sum of her parts resulted in Misery.