I confess I was a big Pete fan, and it's only in hindsight that I'm able to assess his last 8-ish years honestly. Pete Carroll led the Seahawks into mediocrity purgatory after the two Super Bowls. "Mediocre Forever".
Failure #1: Pete's Poor GM Decisions
The Seahawks should be about +6 impact players above where the roster is now, without Pete's abominable GM decisions, probably overruling John Schneider on many occasions. Pete overpaid a limited QB as if he was "unlimited", made ridiculous franchise-crippling trades, giving away high picks, for players who screwed the Seahawks salary cap and hardly played, while pissing away major draft capital. (Harvin, Adams)
What draft capital remained, Pete then pissed away, selecting below average players like LJ Collier, Malik McDowell, Dee Eskridge, Marquise Blair, Cody Barton. (there were some good picks too of course)
Then, for the cherry on top, Pete then pissed away more key draft capital with questionable in-season trades for "rentals" to try to win a couple more games to prop himself up for end-of-season performance evaluations, again mortgaging the future.
On Pete's watch the Hawks gave away draft capital, overpaid underperformers, and put the Seahawks in salary cap hell. (Compare that to our division rivals the 49ers, where during that same time frame 49ers acquired multiple field-tilting guys like Bosa, Run-CMC, Deebo, Fred Warner, etc.) Pete's GM influence, over time, became a net negative, leaving the team underequipped on talent, overpaying much of that talent, and in salary cap hell. Pete initially won by having a cheap-but-good QB and having a large number of players massively overperform their contracts. That advantage faded quickly after SB49.
Failure #2: Pete failed to adjust his defensive schemes to the reality of defending new McShanahanVay offenses, notably demonstrated by getting swept by both the 49ers and Rams this last year, after not being able to get off the field against those offenses when it mattered.
Failure #3: Hypocrisy in applying and demonstrating standards and rules to different players and staff undermined Pete's message and culture
- Violation of "protect the team", Bevell should have either publicly apologized or been fired for "He could have been stronger to the ball" re Ricardo Lockette after SB49 pick.
- Not holding Russell to same standards as other players
Failure #4: Excessive loyalty to underperforming coordinators
-DCs KNJ and Hurtt stand out for this
Failure #5: Failure to bring in good coordinators, outside minds with new ideas on the Defensive side, going with internal hires who couldn't rise above Pete's older system
- And, when he did, the new schitt didn't really work, that "defensive guru" then moved on, but got fired by his new employer within roughly a year (Sean Desai)
Failure #6: Handicapping his coordinators with micromanaging (This one is less clear to me, but often repeated on Seahawks.net)