If I made a claim that “good quarterbacks overcome all the time!” I’m sure I’d be willing to provide a few examples.
And if you did, I'd simply ignore the list so we could be even. That's what you do. You just ignore everything I type. You would go absolutely nuts if I debated against you like you "debate" against me here.
Here are a couple guys who have overcome poor OL play, injuries, etc this year:
Matthew Stafford has one of the worst OL in the league and played most of the season without Cooper Kupp. He turned an UDFA rookie into a top WR in the NFL. His team is sixth in the league in drops. He has a QBR almost 15 points higher than Justin Fields.
Jared Goff has what should be an elite OL, but they have had a ton of injury issues too. Their starting line coming into the season played 75 snaps together before a guard got hurt for the year. Putting their backup in, THAT group has played together for 26% of the Lions snaps. Penei Sewell is their only starting OL to not sit at least one game this year. He's got a great WR1 (as does Fields), but nothing special after that. His team is fourth in the league in drops. Goff has a QBR 16 points higher than Fields.
Russell Wilson has a mediocre OL, an aging arm, and nothing special at offensive skill positions. His top WR is 5th in the league in drops. He has a QBR 5 points higher than Fields.
Joshua Dobbs played half the season for a blatantly tanking team, and then a few games with a Justin Jefferson-less Vikings offense. Neither team has a particularly good OL, and without Jefferson the skill positions in Minnesota aren't anything special either (Addison is pretty good, but not DJ Moore good). His current team is 7th in the league in drops. He has a QBR 9 points higher than Fields.
Jordan Love has been missing his top RB for a while (5 missed games), plus his veteran LT for the entire season. Not much in the way of pass-catchers - Romeo Doubs, Jayden Reed, Luke Musgrave (who's now probably out for the year) are his leading receivers. His team in 9th in the league in drops. He has a QBR 13 points higher than Fields.
Sam Howell, who you mocked earlier for being bad the last few weeks, has a terrible OL and decent but not elite skill guys. His team is 10th in the league in drops.
His QBR is 2 points higher than Fields.
Gardner Minshew came into this season as a backup before their top-pick QB got hurt. The starting RB who has been great in the past has spent most of the year either holding out or hurt. Pittman has some game but again, IMO not close to DJ Moore. The other WR there (Josh Downs, Alec Pierce, Isaiah McKenzie) are either only okay or young or both. His team is 11th in the league in drops. His QBR is 13 points higher than Fields.
Derek Carr lost his 5x Pro Bowl interior lineman for the season before it started. His best WR regressed, and then got injured again. His top WR is 10th in the league in drops. His QBR is 2.5 points higher than Fields.
Obviously Stroud has been fantastic, and most people thought they would be tanking again this year. Instead they're eyeing a playoff berth. His best pass catchers are Nico Collins and Tank Dell (until Dell got hurt yesterday). His QBR is 14 points higher than Fields.
The list of dudes with worse QBR than Fields is like a laundry list of dudes who have either played very little, or who most people seem to recognize aren't that good. Ridder, Kenny Pickett, Mac, Levis, O'Connell. The best QBs with worse QBR than Fields right now are probably Deshaun Watson, who just took a couple years off from football entirely, and Jimmy G who got flat out benched for Aidan O'Connell.
I have no doubt you will nitpick a lot of this list - hell, you'll probably tell me later I didn't even write it out - but the point is that a lot of guys have questionable OLs, injury issues, questionable pass catchers, questionable coaching/playcalling and still seem to produce at a level similar to or better than Fields has shown so far. Even guys you'd never in a million years trade Fields for.
Everyone on the list other than Sam Howell and Russell Wilson has a sack rate at least 4.7% better than Fields'.