The constant, relentless daily dilution is probably the biggest issue. They dump 3-5 million shares no matter what the other volume is. Why would someone buy shares when the volume is heavy (almost never), when they can wait until tomorrow and buy 3-5 mil that has to be sold to the market irregardless of demand? It's a nasty setup.
I understand what you mean about the varied valuations across the industry. No idea how other, money losing, diluting companies have valuations anywhere above par value.