It's an opinion, and everyone's got one ... apparently.
Two of his non-winning seasons (out of 8 in 19 years) are due to injuries (2004, 2013), two are due to rebuilds (2005, 2012), and one is due, by virtue, of having two completely ineffective QBs (2010). His first year was as an interim (1994), so that doesn't count. The rest are .500 or better. One *could* look at the 3 division records and 1 conference championship as "not enough" over the course of his career, and that's what he's doing. But I'm willing to bet $20,000.00 in actual money that this fantasy sportswriter didn't delve into the particulars of any of his seasons to see WHY the records were the way they were.
Lazy. Lazy and irresponsible 'journalism.'