So here's kind of where the fans lose me on this though. My question is... have fans actually looked at the data on this?
The data, though a bit misguided, would tell you its a Monday Night issue (sort of), not a primetime issue.
10-18 career record in primetime games:
2-10 on MNF
3-4 on TNF
5-4 on Saturday/Sunday Nights
So he's basically a .500 QB on Thursdays and Weekend primetime games.
At an individual level, on Saturday/Sunday night football (9 games):
Completion % above 70%
302 passing YPG
22 TDs
4 INTs
Those numbers are a lot closer to ELITE than they are to "terrible".
On MNF, where he's 2-10 now, his stats aren't great, but they're also not terrible:
63% comp pct
240 passing YPG
17 TDs
11 INTs
Now you can make the case that situationally he struggles, but these aren't numbers of a guy who plays in the fetal position for four quarters in primetime. Comically TNF has been, by far, his worst performances, yet his team's record is significantly better there than on MNF, where apparently he sucks balls all the time (though not really).