Book where teens play generic D&D and get cursed minis that send them into a fantasy world as the wrong character archetypes.

I read it in middle school, so it would have been written before the early 2000s.

Some teens play generic d&d and got cursed minis that send them into a very dark and grim fantasy setting. But they all got characters that were wrong. The pushy intelligent guy who led the party in the games became a big muscular low int character who couldn't think very well which was a personal hell for him. I think there was a character named Will. I remember some plot elements, like they stayed at a monastery and found out the inhabitants were monsters who lured travelers in and killed them, then ground their bones into meal to grow wheat for bread. There was a crystal pyramid cage around an item they wanted, and the rogue used his stiletto and the big guy's hammer to shatter it. They all got characters who didn't fit them to make them self reflect and I think I remember the pushy guy goes villainous and just becomes a bully because he can't lead through any way but fear but he can't stand not leading, and when they all get home he's understandably not very welcome in the friend circle.