A few things.
One, yes, there were issues along the OL and at WR and Pollard getting hurt and Zeke being a slug didn't help, but again, Dak wasn't very good. He wasn't sharp, he made some questionable reads, he missed open WRs that could have changed the course of the game, he made some really bad passes. Does he get all the blame, of course not. But sitting here suggesting that it was the OL and WRs and RBs that lost us the game is just a real stretch. There's nothing that suggests if we had a better OL or WRs that Dak would have performed much better and we would have won. When he's missing guys wide open, it's hard to imagine that changing the WR, for example, suddenly makes him see those wide open WRs.
Two, the Eagles have had a really good OL for a few years, even before Hurts took over. So no, he didn't get better because his OL suddenly got really good in 2022. It was good before that. Hurts improvement was multi-faceted - adding AJ Brown was a huge factor, he's apparently a tireless worker and spent a lot of time in the previous offseason training and working with guys to improve his passing. Plus, he just got comfortable in the NFL. Guys tend to get better the more comfortable they get in the league.
I think people are making a big mistake here thinking that if you just gave Dak the Eagles OL, suddenly he'd be just tearing **** up. Yes, a better OL would help. A better #2 WR might help. Better playcalling should help. But at the end of the day, Dak just wasn't very consistent last year and was doing things that simply had nothing to do with the OL or the WR. He just was plain bad at random times last season. That's just the reality and if this team wants to move beyond where they keep sputtering out, yes, the roster needs to be better and play better but Dak absolutely has to improve his play (or specifically just get more consistent).
PS - I have no idea if Mazi Smith was the correct choice in terms of him as a player, but DT was absolutely a big hole on this team. So to suggest that OL was the absolute clear biggest need that should have been filled at 26 is a stretch (and doesn't even take into account that at that pick, there really wasn't any OL available that wouldn't have been considered a bit of a stretch).