Damn that's fucking ridiculous. Sounds like he did it by the books though. Taking out your starters early and letting the clock run to end it faster. What else could they do. Telling them to "take it easy on them" is fucking ridiculous. The point is to play hard the whole game, good sportsmanship but play hard. If the worst players from the bench are still getting touchdowns non stop against you, you might want to work on your team a bit in the future.
People just love to bitch and say the world was out to get them.