If this ‘parent’ gets mocked and/or ostracized she deserves it.
I have no problem with the score and the coach. When you put in your second and third strings you do not tell them to screw up and goof off but to play hard just as if it was a close game.
I do have a problem with a coach who would leave in his first string late into the 4th quarter just to run up the score in a game that was settled early in the 1st quarter. No class.