They make shitty helmets based on what? Every k2 helmet I've tried on has fit my head well.
However, i did decide against the rant. While it foes have the venting, its pretty minimal. Im leaning towards the diversion helmet. Pretty similar in style to the rant, but much more venting. Of course, the price is double the rant so it may not happen.
Im curious why you think they make bad helmets though. If you've got multiple sources that report the same I'd love to see it.