Patricia gets a bad rep here because, stylistically, the defenses he coordinated seemed more passive. How much of that was his philosophy versus the players he had at his disposal is a good question, but regardless of style his results were pretty much the same over the long haul as anyone who's served as DC (either named or unnamed) in the Belichick era. The exception there being Crennel in the first dynasty, but those defenses were also VERY talented at all three levels and could play by very different rules.
Most often I see people point to the stylistic difference between 2017 under Patricia and 2018 under Flores. But here are the defenses rankings for those years:
2017 - 4th in yards allowed, 5th in points allowed.
2018 - 21st in yards allowed, 7th in point allowed.
The big difference came in the playoffs, where the 2018 defense had a really nice run (capped off by a dominant SB performance), where 2017 ended with a really sour taste defensively (which may have had a factor at play that I won't mention here for fear of derailing the thread entirely).