The French side suffered a 14-4 loss at the KC Stadium on Friday to relinquish their hopes of reaching the preliminary semi-finals of the playoffs.
"It's an emotional dressing room," BBC Sport quotes him as saying. "It's disappointing that we say goodbye in that way.
"We missed the vision of Scott Dureau and his kicking game as well. It's very disappointing that we couldn't execute, especially with all the possession we had. Hull defended pretty well, so credit to them. That's why they won."
The Dragons failed to score any try in the match.