1) It wasn't a bad call. Bad
rule maybe, but not a bad call. It was the Rodgers Rule - can't land with your full weight on the QB; too much risk of a shoulder separation, broken ribs, etc. You're expected to pull him down and land beside him. Watch the replay on here and you'll see he clearly lands with his full weight on him, driving him into the ground.
operations.nfl.com
"A rushing defender is prohibited from committing such intimidating and punishing acts as “stuffing” a passer into the ground or unnecessarily wrestling or driving him down after the passer has thrown the ball, even if the rusher makes his initial contact with the passer within the one-step limitation provided for in (a) above. When tackling a passer who is in a defenseless posture (e.g., during or just after throwing a pass), a defensive player must not unnecessarily or violently throw him down
or land on top of him with all or most of the defender’s weight. Instead, the defensive player must strive to wrap up the passer with the defensive player’s arms and not land on the passer with all or most of his body weight."
It's pretty clear Frank Clark was in violation of this rule even at first glance. I know Chris Colinsworth was incredulous because he doesn't know basic football rules, but yeah, not a bad call.
2) The Chiefs had their own fair share of questionable calls. The Kelce flop on the uncatchable ball which was somehow "pass interference" extending a drive and leading to a KC TD, for example. The defender makes minimal contact with Kelce other than hand fighting, Kelce flops, the flag comes out even though the ball was 15-20 downfield, and the drive stays alive. Of course Colinsworth with his tremendous football acumen says Kelce was "thrown to the ground, basically", but to anyone with eyes the flop was incredibly clear. Let's not pretend that the flags stole the game from the Chiefs in an 18 point loss.
3) The real momentum killer was Mahomes getting picked off in the red zone, or maybe the pick six. Not sure which is worse, restarting a drive but now down 7 more, or getting within scoring distance only to walk away with nothing thanks to a bad pick. If you factor in that pretty clear 14 point swing, the Chiefs still would have lost, of course, but at least they'd have been within 10. The Chiefs have the worst defense in the NFL, this won't be the last game they lose this year. Mahomes is the 9th best QB in the NFL by passer rating right now, so certainly they'll win plenty as well. Especially considering 2 of the 8 QBs ahead of him are injured right now (Burrow and Wilson). But while he leads the league in TDs, he's tied for 3rd in Ints. He's not exceptional at pre-snap or even post-snap reads, and everyone knows the 3 elite players on the team (Hill, Kelce, and Mahomes) so the amount of wide open shots to them continues to drop. Meanwhile despite that, Mahomes has a 130.9 passer rating when targeting them this season, and an 84.0 when targeting anyone else on the field. It's not like the rest of the team is stepping up to take advantage of the opportunities. Rather, Mahomes still has more completions to those two than to everyone else on the team
combined. So they'll continue to draw double teams, and the more they fade, the more Mahomes will.