Why a verbal thrashing of players that borders on abuse is considered motivational, I'll never understand. Maybe it's effective in getting the adrenaline pumping, but I think at the root of it is instilling a fear of failure, and I don't think that's a viable approach for long-term motivation.
I'll leave it to basketball great Michael Jordan to explain why.
"I've missed more than 9,000 shots in my career. I've lost almost 300 games. Twenty-six times, I've been trusted to take the game-winning shot and missed. I've failed over and over and over again in my life. And that is why I succeed."— Michael Jordan