This is a great article - it really set me thinking.
I recall an article from a few years ago that probed the "crazy ex-girlfriend" trope, wondering why we don't have a "crazy ex-boyfriend" trope that views men in the same light. The broad conclusion was that crazy ex boyfriends actually kill women and their children.
One of the issues with men behaving poorly is that violence is central to their actions. So we won't have a Ken who will ask to speak to a manager - Ken will be physically or verbally abusive. We won't have a Ken who will summon the police over a black family having a picnic. Ken will be verbally or physically threatening and may return with a weapon to sort things out. It's easy to pick on Karens because there's a limited potential for physical harm. Try picking on Kens by blasting them all over social media, and you'll be looking over your shoulder for the rest of your life.