I don't know if it's something to do with expectations along with degree of difficulty.
We were low on Dak for how he played against Washington, then he was excellent against the Bucs. One of his best games.
Then he goes back to being useless against the 49ers. I get it they're a great defense but Patrick Mahomes didn't have a problem destroying them, not that anyone compares Dak to Mahomes (except for a few tards on CowboysZone) but you won't get anywhere only beating mediocre teams. I'd rather just lose and tank than be average because then you're trapped like the situation we're in now.