Question for Shanks fans: How can Mihawk be a stronger swordsman than Shanks, but still have worse haki than him. What else would they be fighting with?

It's like saying Garp is a stronger fighter than Kaido, but Kaido has better haki. How the hell is Garp a stronger fighter then???

A sword fight in OP is just two dudes applying haki to their swords and swinging them like baseball bats