Overall > 0.5 win rate each year: https://www.pro-football-reference.com/coaches/TomlMi0.htm
But after 2016, playoffs? Not so much.
The NFL has a draft system where the worst team in the league gets the best pick in the next year's draft.
Tomlin dragging teams that should have won 2 or 3 games into the playoffs each year just to lose immediately meant that the Steelers never got any good draft picks and thus never improved the team year of year.
They were stuck in a purgatory of sorts.
Don't let the "gridset" bros lie to you: one can simultaneously have hobbies and leisure time while being productive and successful.