I can't argue Bears results (other than hindsight being 20/20), and to your point, maybe that's all that matters.
But I have never liked his style of coaching. Indifferent vs. involved / excited (from outside looking in anyway). The 100% concentration on defense at the expense of offense. Seemed like every Bear high draft pick was on defense, with very little obtained for the offense (Rex is our QB). Saw this same pattern again at Illinois with recruiting.
And then the stuff around hiring his son, etc. Certainly not exclusive to Lovie / Illinois (Ferentz) but a horrible thing to do.
Similar to
@bluemountain, I did not like Lovie as a Bear coach, but the deep bitterness came after his Illinois tenure.