Part of me thinks Schmitty would actually be really happy if Garrett returns. A chance for Garrett to prove he was right all these years.
I like Garrett, but the time has come. My personal opinion on him was, he navigated the team through a rebuild, albeit one that probably took too long, but whatever, the GM gave him an extended chance.
Then he began to turn the corner with Romo (2014). Then Romo got hurt (2015), which I felt very strongly he deserved a mulligan for. Then he returned them to Division Champs/Divisional Round again (2016), again after losing Romo, and I felt that was his strongest coaching year to date, and that his arrow was maybe pointed upwards. My feeling was, if you are forgiving the rebuilding years, you don't fire him with two division champs in three years even after another disappointing playoff loss to Green Bay.
Then 2017 wasn't good, but it again was accompanied by a ridiculous screw job by the NFL in the Elliott suspension. Maybe he should have overcome that, but again I felt like in the absence of a Sean Payton type being imported, I was willing to wait and see. By that time I was saying, though, "I'd approve of a targeted improvement if one could be found."
In 2018, he was on pace for termination, but then he turned around and won 7 of 8 games including a playoff win. Again, hard to fire the coach after now a third trip to the Divisional Round in 5 seasons, including playoff wins, but of course, the writing was on the wall that more was needed at this point.
2019 was make or break and he broke. And there were no real excuses this year: They had a favorable schedule and pretty good health. Nothing you can say about it. At some point you run out of steam and it's now unarguable.
I don't think anyone could definitely say he "could not have" won here, because these things come down to very small margins, and a lot of average coaches have appeared in championship games and Super Bowls, but at the end of the day he didn't get it done. Life moves on.