Don't switch stacks. He's expressing an opinion about code from Rails developers which is about as broad as opinions go this side of saying "black people are like X" or "Asians are like Y." On the bright side he does leave the door open that Rails developers could write solid code though most don't in his opinion. The best thing you could do is continue working on Rails but read a variety of opinions on good code in different languages, read Coders at Work and similar texts on coding, and remember not to blindly follow coding trends. Generally keep your code simple and work to find abstractions to fit your domain.

I'm not saying anyone here is incorrect in their generalizations of Rails developers. I've obviously never seen the code they are criticizing. But they also aren't providing any useful information. Keep that in mind above all else. There will always be politics and disagreements. You're never going to make everyone happy and it would be a disaster to try to.