I can't believe what some people say in the comments here on Medium. If you didn't enjoy the read or have nothing constructive to say - move on. You are entitled to an opinion but no need to get nasty.
I've tested the waters recently with more provocative articles. The comments weren't as bad as I expected, but some of them I just can't even be bothered at engaging with. They've made up their mind on the subject and there's no point arguing.
Sadly, it's a sign of the times. Like the spammers, people feel the need to have their say at the expense of the author. It's like the 'tall poppy' syndrome: those who succeed should be chopped down or sabotaged because the other person was so jealous or totally missed the plot.