I like to rewatch the losses before I give my analysis on what happened. This game was not on Joe Flacco. You could say it's on the offense to some degree, but a lot of why it's on the offense is because of the O Line (and Pitta) failing miserably to do their jobs. Between the missed blocks (Pitta with a couple doozies in this game) and the drive-killing penalties, there's not much more you can ask of Flacco. He wasn't perfect, far from it, but he took what was given to him, it's just that this offense as a whole isn't good enough for that to result in scoring consistently.
But the real story is actually how the defense completely failed to give us a chance to stay in this game.
On our last drive of the first half, we drove 47 yards in 10 plays and used up 4:18 of clock to score a field goal to up 10-7. But then the defense gave up 63 yards in 8 plays in the final 1:37 of the half, allowing a field goal to tie the game going into halftime.
To start the 2nd half, Flacco throws 22 yards on first down. Then on on the following first down play, West gets a carry for no gain. On 2nd down, Pitta stays in and is assigned to block Demarcus Lawrence. He fails miserably (Pitta had an absolutely terrible day as a blocker), just gets turnstiled, and Flacco gets leveled as he unloads deep for Mike Wallce. The ball sails way high as he's hit while he throws and it's already 3rd down and 10 to go. Lucky it wasn't intercepted, actually, but this is Pitta's fault on a catastophically failed block. On 3rd down, he throws a comebacker to Wallace well beyond the first down marker. A good defense play is made to knock the ball away as Wallace waits for it to reach him. There was plenty of room (he was like 10 yards past the first down marker) that he could have kept coming back towards the line of scrimmage and gotten to that ball before the defender did and still been well past the first down marker, but he didn't - instead he turned around, took one step towards the line of scrimmage, and then planted himself and waited for the ball to get to him, giving the defender time and space to catch up and knock the ball away in front of him.
So, we punt and pin them back at their 8 yard line. I's tied up at 10-10, we've pinned them deep in their own territory, and the defense has not seen the field in 20 minutes of real time. Despite being rested and having half-time to make a defensive adjustment (they had already begun to give up way too much to them on their final drives of the first half) they give up a 7 minute, 11 play, 92 yard touchdown drive to put us in the hole 17-10.
On our ensuing drive, Flacco throws a 5 yard pass on 1st down, setting up 2nd and 5. On 2nd down, he runs it for 6 yards and a first down. 1st down again, we get a 9 yard carry from Dixon, but Zuttah is penalized for a late hit and sets us up at 2nd down and 16 to go instead of 2nd down and 1 to go. Flacco picks up 11 yards with a screen pass to Mike Wallace on 2nd and 16, setting up 3rd and 5. So on 3rd and 5, there's another screen pass to Wallace. This time he gets drilled shortly after catching the pass, and the first down isn't achieved. Nobody was open past the sticks. The only other viable option might have been Juszczyk, but he was in the same area and would have also needed yards after the catch that he probably wouldn't have gotten (and Flacco would have had to wait longer to unload the ball anyway because Juszczyk hadn't yet turned for the ball by the time Wallace was already catching it, and the defenders that weren't near Juszczyk only weren't so because the ball was already on its way to Wallace and they were zeroing in on him, because that's where the ball was going). OK, so the 3rd down play wasn't a good call, but there was nobody open past the sticks for Flacco to look for on this one anyway. The screen had worked great on the previous play. Good questoin is, why was the same play called twice in a row, I think (Anybody else ever think, maybe the biggest problem outside of the offensive line and penalties is that our ever-changing offensive coordinators just aren't calling good plays!)
Anyway, we punt with more than 20 minutes of game clock left in the game, down by 1 score. It's not a big deal at this point, and the defense should be counted on to do their job after we punt and pin them on the 12 yard line this time. After all, they've only been on the field for 1 drive in this half so far. Our drive took up about 3 minutes off the clock, by the way. We do not 3-and-out at all in the 2nd half.
But nevertheless, on the Cowboys' second drive of the half, we allow them to go 88 yards on 13 plays, eating up 8 minutes off the clock, and putting us in the holed 24-10 with only about 10 minutes to go in the game.
We did score a TD on our next drive, but then once again the defense lets them score, this time it's a field goal after a 13-play, 6 and a half minute drive in which we had to use all of our time outs. So our defense not only gave up the points making it a 2-possession game again, but we didn't get the ball back until inside of 2 minutes remaining and with none of our timeouts left.
At this point, the game is lost (barring a miracle, which you're crazy if you think this offense is going to produce, on the road against the best team in the NFL).
The important thing to me is that starting with the Cowboys' first possession of the 2nd half, our defense went from having us in a tied game, to allowing 2 touchdowns and 15 minutes of possession on back-to-back drives. That's a catastrophic failure. That's as bad as you can do it. It didn't happen because they were "tired" as I've seen suggested -- it was not the offense's fault that the defense failed. Then when our offense adjusted and scored a TD on their 3rd drive of the 2nd half and got back to within 1 score, the defense once again failed, giving up nearly the entirety of the rest of the game clock, all of our timeouts, and another score that made it a two-possession game again.