This game actually wasn’t that complicated, from everything that has been revealed thus far. And non-standardized role PMs are not uncommon. So, really, you’re complaining about nothing. The biggest problem this game was the refuse of certain players (Meeko most notably) to play the f-ing game. Hardly the mod’s fault.
I think that bailing like this is really bad form. The game was set up for a bloody, complicated, and potential cool endgame. Town might even have had a chance, depending on exactly what was going on with the sinners.