I feel like fans are so used to seeing coaches call so many timeouts at the end of games, that they can't comprehend when one team doesn't follow the same routine. All of these out of timeout plays have been run in practice, so is there really any need to call a timeout to set it up?
It's not the coach, it's the lack of execution by the players. We are seeing the same issues pop up every year with this core, yet we're on the third different head coach. At some point, the blame has to be placed solely on the players.
I doubt all three head coaches are telling Jaylen Brown to defer to Tatum in the fourth, but are also fine with Smart taking all the big shots that Tatum passes up on.