All the Yonko are Garbage besides Shanks.
Kaido needed a special club with Haki( Black lightning) and Luffy's observation haki not working( due to being emptionally comprimised) at all to one shot Luffy.
Big Mom needed Haki combined with her devil fruit and body weight to stop a normal Basic Haki Gear 4 kong Gun. And it still shook her arm.
Shanks on the other hand is a true fighter. The only other true fighters are Mihawk, Katakuri and the Admirals.
Luffy should be facing real fighters like the Admirals, where he can actaully improve fighting agaimst them.
Kaido needed a special club with Haki( Black lightning) and Luffy's observation haki not working( due to being emptionally comprimised) at all to one shot Luffy.
Big Mom needed Haki combined with her devil fruit and body weight to stop a normal Basic Haki Gear 4 kong Gun. And it still shook her arm.
Shanks on the other hand is a true fighter. The only other true fighters are Mihawk, Katakuri and the Admirals.
Luffy should be facing real fighters like the Admirals, where he can actaully improve fighting agaimst them.