I think there are a lot of things that go into coaching, and overall Brad is a net Plus. Prep work, practice, schemes, in game choices, etc.
I agree that I do not like his late game strategies. At some point, consistent blowing of leads is a systems issue, especially when it seems to happen in the same way, and in a way that is distinctly different from how they play the first 43 minutes of the game. Suddenly, in the last 5 minutes, they pressure the ball and end up scrambling and allowing open 3s (the worst thing to give up to allow a comeback), and on offense, they let 1 or 2 players use 23 seconds of the clock with little motion then get forced into a bad shot because they haven't left themselves time to reset and find additional options as the defense breaks down.
It's odd for a relatively younger and creative coach. It seems outdated, like "no team can come back from 8 down with 4 minutes left", kind of a 1990s style concept. Very outdated with how much better teams are at shooting 3s.
If this were football, it seems like Brad would be the coach who would get the ball back leading by 4 against the Chiefs with 4 minutes left and would do 3 runs into the middle of the line and punt, only to lose by 10 when tyreke hill and travis kelce score 2 TDs withing 45 seconds of each other.