Garrett as HC was mind numbing, but teams could do worse. Yes he is a .500 HC and teams could do worse or even better but for a team looking for that ideal coach, JG is a decent place holder. His teams were competitive but not spectacular. In QB parlance he is a bridge HC.
for an NFL team there is no HC worse than someone like Garrett
Has a background in football
Was a QB
graduated from an Ivy League school
Football family
Knows to say all the right things
Had the demeanor of a HC during games and in PCs
all these fool people into thinking this guy knows what he is doing and so he hangs around and hangs around and hangs around while the team remains 8-8 so middling draft picks and no chance to really suck and get a top end QB