I love how the DC Universe's greatest nemesis is a deranged message board fanboy troll who thinks he's Superman and that everything that's happening in the DCU is done wrong and not as good as it used to be.
All of Final Crisis was a metacommentary on fictional universes; this is like the ultimate most loony and/or appropriate way to cap it off. It's the ideal commentary on the internet age - fans interact directly (and angrily) with creators, and affect the direction of the stories more than ever- and thereby shape of the whole universe. Now they're actually a character in that universe, it's come to that point. It's not over the top, it's literal reality now.
And what to take away from how he undoes himself - that all this bitching is self-negating?