Yeah, because there are so many great coaches out there with horrible QBs.
Answer me this. How much of a genius would Bill Belichick be if he didn't have Tom Brady? Now keep in mind, he had a horrible record as a HC before Fairy Boy came around. How about Mike McCarthy? We all saw what happened to the Colts last year without Peyton Manning, and then this year with Andy Luck. Think Tom Coughlin isn't thankful he has Eli Manning on his team? He wouldn't have 2 rings without him, that's for sure. Bill Cowher had a lot of success with average to poor QBs...thanks in large part to a dominant defense and running game. But even he had plenty of shitty seasons with those same average to poor QBs, including 3 consecutive .500 and below seasons from 1998-2000 and didn't win the big one until when? That's right, when Ben came around, the very guy that he had to be forced into drafting by Dan Rooney.
Bottom line is, EVERY successful team has a top-shelf QB leading their team. It does NOT make the head coaches of those teams horrible or "below average" as you claim Tomlin is. I think the true shitty coaches are the ones who have good QBs and still can't win (Norv Turner, Jim Schwartz, Jason Garrett).
But nevermind. You go on being the ultimate "glass-half-empty" guy. I get that you simply want to see better play and better players, but damn man...would it kill you to give out a compliment or 2 more than once in a blue moon?