I have no problem with Sam limiting KAT's minutes, it's exactly what most criticized Flip for not doing last year with Wiggins.
I don't blame Sam Mitchell for anything to do with the W-L record either - you play almost every three days/going from city-to-city. It's on individuals to sort of 'get up' themselves on the day of games. Obviously with the 76ers or teams with little to no veterans - it's a more important aspect to the job, like in Brett Brown's case.
But the T-Wolves have multiple, from different championship-winning teams (Prince, KG) and the players want to avoid disappointment in the eyes of Garnett as much as Mitchell if I had to guess. One's just fear, one's just fear of losing minutes. Same effect.
It's not like in the NFL where a coach has a week to surround his team with a well-constructed game plan, I don't think coaches could affect records that much in situations where you can't flesh out an opponent; dissect for weaknesses. They might alter something late in games with substitution preferences/play drawn up, but for 95% of the game the players are out there deviating when they want to and making the best on-court decisions they saw at the time, so if it's tied or close at the end of games that's on them ultimately.
Was looking up last three games stuff - 3PA:3PM ratios.