The reason why bluepilled manlets don't go ER: This society uses the "napoleon complex/short man syndrome" stereotype to shame short men from displaying any form of aggressiveness, despite any and all mistreatment. This essentially acts as brainwashing, so short guys are basically neutered and do not take revenge on society. They are like a dog or horse that has been trained to behave itself.
The reason why us shortcels don't go ER: Same reason all of us incels haven't roped yet. Inhibition. If I could find a way to get revenge safely I would have by now. Short males aren't even treated as human.