James' red card for a wild challenge on Mateo Kovacic handed the visitors the advantage and led to a 3-0 defeat at Elland Road.
Marsch later said: "One thing for sure I'm not going to sit here and blame anyone. Our guys come everyday and they do everything they can, they stick together, they fight for each other, even on the third goal you see guys diving around the box doing everything they can to keep themselves in this league and in this match.
"I love these players, they fight to the end and we have to find ways to rewards ourselves and not go down in matches and stay even.
"You want to see that passion but how much more composure do you need from your players?
"We have to find ways to be in the match more, control moments more and obviously stay even so that we give ourselves a chance."
He added: "At first I thought it wasn't a red. I haven't seen it but I was told it was a red. Dan said he didn't mean to do it, he was just trying to be aggressive to win the ball and caught him in a little bit of a bad way Dan feels terrible."
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