Look, he played well in the first half.
He missed a few big throws in the second half. It's tough to win when you can't pass the ball, and he didn't have help.
But that interception was high school freshman-level bad. He stared down his receiver, and then hit the defender in the numbers. We were down 7. There was just 2:30 left in the game. That sealed it. Sure, if he throws it away we are facing 4th down. But at least we would have still had a chance.
He didn't lose the game alone. But we haven't had good QB play in years, and it would appear that he has all the weapons to throw to he would need. Most of the game, he had more than enough time. So either it's an execution issue (him and the WR's), or a playcalling issue, or more likely, it's both. But with the talent at WR and with enough time to throw, I would expect a little more than 66 yards in the second half.