Say “we lost” as easily as you say “we won.” Teams hear the difference.

Pronouns tell a team what you are. We after a win and they after a loss gets noticed within about a game, and it quietly decides whether people cover for you later. Sharing the bad result is the entire cost of being trusted with the good one. Nobody says anything about it out loud, and everybody keeps track.

After the next loss, use we in the first sentence you say about it. Name your own part specifically, without turning it into a performance of guilt.