The throw was awful and it's lucky that Polk came as close to catching it as he did. I'm usually hard on WR's, but that one was entirely on the QB.
What I don't understand is 19 rushing attempts versus 34 passes against a team that has a shitty run defense. That is an inarguable coaching fail from the top down.
Brissett is a goat - he sucked even when he made a couple of throws in that final drive. NFL QB's need to do better than make a couple of tough throws per game.
So looking through the PBP it isn't all that indefensible even without knowing when Brissett checked to pass:
1st- possesion.. 1 run, a sack, then 3rd and long have to throw.
2nd- pass/run/pass/run- TF
3rd- Holding... 1st and long pass, 2nd and long QB run, 3rd and short... penalty.. 3rd and long pass
4th- run, holding 2nd and long pass, holding, pass, pass, run missed FG
5. Under 2 minutes... run, pass, pass
6. 28 seconds left... pass, pass, pass
7. run, run/holding 2nd and long, convert via penalty, run, pass, pass, run, pass, run 2ndlong pass, 3rd long pass
8. run, run, pass
9. run, pass, pass, run 2nd long pass, 3rd long pass,
10. pass, pass, penalty, run, run run holding, 1st and 20+ with 2 minutes left, pass, pass, pass, 1st, pass, pass, pass, pass, penalty, pass, pass.
I would guess the neutral pass-rate doesn't look bad at all. They just had a lot of long yardage situations due to penalties and a 1-14 ratio at the very end of each half, so it was 18-20 if you exclude the 2 minute stuff, and even that was driven by a lot of long yardage situations.