And I'll thank you not to infer how I run my campaigns.
Maybe I am a GM rarity, but I don't believe that giving the PC(s) a single shot when they're at the end of their line to stop something horrific from happening qualifies as "good GMing." A fair few folks I know would put that kind of crap under "railroading" and "punishing the PC for not going along with the GM's plan."
Let's so how upset you would be if a random monster (and that's largely what the dragon is, a random monster) suddenly shows up, wipes the floor with your PC, and says it's going to destroy one of the most important things in your PC's life, and there's really jack-all you can do about it.
But then I suppose the folks that like this strip would be just has happy if the heroes finally get back together, go to confront Xykon for the final battle... only to learn that's he already unleashed the Snarl which is going to destroy reality on its next turn... and it has initiative. Rocks fall, everyone dies. Enjoy the show.
And before anyone else makes a snide remark about it, I am bloody well frakin' aware
that this isn't representing a gorram tabletop game! But others who are similarly aware of that haven't stopped from trying to figure out the game mechanics of scene, and I don't see people mindlessly bashing them.
Point blank, I didn't care for the strip based on personal preferences. Got a problem with that? Go take a long walk of a short plank.