2014, 2017, and 2018 are the years that really piss me off. The Steelers should have made the AFCC game at least in one of those years, probably in more. I lay the blame for those years on Tomlin.
The 2014 team fell apart because Tomlin cut Blount halfway through the season and ran the wheels off Bell without ever finding a real back-up. Then, when Bell was injured in the game before the playoffs, they had to panic sign Ben Tate. It was totally idiotic. That season was a total f***-up. Beat the 2-14 Bucs and the 4-12 Jets, and the Steelers get the bye that season and might have been resting starters in week 17. If you're going to cut your back-up RB, then maybe go out and find a suitable back-up sometime before the season ends so you aren't screwed if Bell goes down. But instead, the Steelers go down in flames with Ben Tate in the wildcard round against the Ravens (without a running game, the Ravens tee'd off on Ben all day, concussing him by the second half), while Blount gets a ring. I wonder if Tomlin's failures with Blount led to some of him more permissive leadership we've seen since?
Losing Shazier in 2017 was a big blow to to team, but Tomlin had half a year to adjust. I wouldn't expect the defense to be as good without Shazier, but it shouldn't have been "give up 40 points to Blake Bortles" bad. The Steelers were totally overlooking the Jags (see idiot Mike MItchell's behavior before the game) and choked. It was a playoff trap game, and Tomlin, as per usual, led the team to a classic trap game loss. I rank that game as the most painful loss in Steelers history, worse than the 1994 Chargers loss, worse than the Super Bowls losses.
2018 was a debacle. Sure, Bell was holding out, but James Connor was a serviceable replacement. Nevertheless, from blowing the win against the Browns in week one, to blowing the game against the Broncos that they should have had well in hand (thanks "X-man"), to losing yet another game to the woeful Raiders (a Tomlin tradition) in the "time pressure" game, the Tomlin Steelers turned a first-round bye into missing the playoffs despite finally beating the Patriots mid-season. The AFC was weak in 2018. The Super Bowl that year was the infamous 13-3 Pats over Rams game. The Steelers should have at least made a run. Instead, due to a multitude of in-game f***-ups, they were on the sidelines.
After the choke in 2017 and the collapse in 2018, Tomlin should have been fired. Instead, in 2019, Ben is lost for the season, we trade for Minkah to save NHALS, Tomlin has his dream season, and he saves his position as permanent Steelers head coach.