Mifune drinks hard, yells, and he is the coach of the losers.  His methods are ancient and he pushes the campers to the mental and physical limit.  But there may be a method to his madness.
What's your problem?
¿Qué le pasa? Desde hace rato 
sólo nos llama "desperdicios".
¡¿Pero qué pasa con éste? No hace más que llamarnos desechos humanos.
Qual o seu problema?