He was atrocious against Pittsburgh too. It's more than "a bad game." Also, it isn't just a bad game because he looked completely lost and completely overwhelmed. Closest I have seen to that are the classic Darnold meltdowns where you can see on his face in the game he isn't gonna recover.
And he looked that way for two straight playoffs games with a potential cakewalk to a Super Bowl appearance. That's insane to melt down that hard on the biggest stage.
He has been on a fairly steady downward trend across his three seasons, so I am not sure what the deal is with him.
That was such a massive meltdown and the way he has handled the press conferences since would make me very, very, VERY worried if I was a Texans fan.