That's not King's fault bro.
Oda was really not himself when drawing Onigashima arc. Even Kaido, Big Mom, and also Marco, Queen, none showed awakening.
Ofc, it's Oda's sole fault because he was adding way too many filler chapters with characters running around and Scabbards dealing with Lanjuro. Heck, this mf died and they still had to deal with his aftermath when he summoned a giant fire cloud. This was supposed to be King's role because his epithet is literally "King the Wildfire" but how comes Lanjuro is spamming that shit instead?
I don't even get this. Didn't Kiku cut this mf even down at the start of Onigashima? Weren't they supposed to be defeated by Kaido?
Believe me, cut that shit out and we might see a skillful battle against Sulong Inu vs Hybrid Mode Jack with Fishman Karate and Zoro fighting awakened King. Or Jack vs (Water) Jinbe might be great as well. Who's Who just wasn't a good challenge for Jinbe.