I spend a few decades in the industry and in even more teams. I think, the quality of code strongly correlates with the team's ability to articulate its members cognitive load and skills. In some projects it is just not opportune to point out a need to skill up, so everybody just accepts whatever in PRs and quality never gets any better.

On the other end of the spectrum you hear sentences starting with: "It would help me to understand this more easily, if ...".

Guess, what happens over time in these teams?