What you describe is just one particular case of an informal, game-chat alliance, all such alliances are doomed to end at some point. If your former ally kills you, so what? That is the game.
Focusing on the supposedly suicidal aspect of the alliance is just "bad marketing".

I say " supposedly ...

I know he already has been banned enough, I'm just venting. We used to have a good time playing but lately he keeps doing this. I'm not going to go looking for others since I'm not asking for a ban just drunk and bitching.

https://www.conquerclub.com/game.php?game=23110665

Miss, miss, take turn ...