2020 Saints RB Grades (Via Saints News) {several other positions also rated}

Brees typically read defenses well pre-snap and got the ball out fast. That helped reduce the number of sacks that he took. The "time to throw" [stat] that the Saints OL gave Brees this past season was very middle of the pack.
Still doesn't justify anyone saying that the OL was not good. They were ranked the 2nd best unit in the league for two years in a row. That ranking isn't based on pass protection alone. It's just easy to throw that out there to somehow try to make Brees look better when it's not necessary. It's not necessary to find fault with other aspects of the team to elevate Brees yet many fans do it.