Yeah really?
King told everyone to kill Momo. Of course he cared, wtf you talking about? Both King and Sanji used haki. King was on the offensive while Sanji had to save and hold on to Momo. Sanji was the one that was restrained by circumstance while King was going all out, looking like a bum
No, King just has no grip strength to speak of. That’s why he tickled Sanji with his chokehold
Kaido at the least is always drunk and unprepared, unlike King who was looking straight at Inu and failed to react and maintain his grip. And a bullet even irl carries a lot less power than let’s say a punch from an experienced boxer, so even if we try to scale, Neko’s hit should be a lot harder