He didn't tank it. Tanking is like Kaido who is suffering no damage. The seraphim tanked Sanji's Kick. King was enduring that attack.
After bird dance King was retreating and had a very worried look on his face. It's clear that since finding out his weakness Zoro was clapping him, not because of Adv CoC that only spead up the process.
Say that all you want. GB bodied him alongside Queen then made a statement putting him in his place portrayal wise. You can bet your ass Oda ain't having Ryokugyu treat Croc or Doffy like that.