They only knew what little bit of info they gathered from Dutch and Anna so they didn’t even know he had more than one vision mode. They essentially went in to a small packed room to get slaughtered. Had they known this and could counter that and he still won then yeah I’d agree with you. It wasn’t until Gary Busey and Mike came that CH took any real damage.
JH fell for their trap, got loose, and slaughtered most of them even when Mac and Dillon had the jump on him.