The crux of the advice is that as tempting as it is to vent (belittle, demean) and make yourself feel better in the guise of holding people accountable, it’d be better to focus on how to help the person perform better.
Where Bregman really hits the nail on the head for my money is the remind us that high performing employees already feel your disappointment acutely when you express that something hasn’t hit the mark. You don’t need to spend more time on the disappointment piece but rather on how to build confidence to hit the mark the next time out. This is through building trust that you can get across the finish line. Best piece of simple advice, take four deep breaths before you react in the moment to figure out how to recalibrate to give your employees what they need to get over the next hurdle.