He gets results, sure, but aside that great 2010 SB run, how many potential other SB appearances and wins has he lost out on because he got massively out-coached, his teams out-played, and frankly, in key pressure moments in post-season games in GB and Dallas, he choked. 2009, going 15-1 in 2011 and falling flat on his fat arse against a 9-7 NYG team, getting beat two years in a row by S.F. in 2012-13, losing a NFCCG he had dead to rights @ Seattle but due to horrendous late-game HC and bad luck, GB choked away a near 2-TD lead in the last 4:00 minutes. He had two HOF QB's and all he has to show for it is one SB and that game couldve easily gone other way if Pittsburgh doesn't make a few key turnovers in the 2nd half.
When it comes to winning close post-season games, McCarthy is no Belichick or Andy Reid and he loses far more then he wins.