No. That's just... no.
There are tons of DM's out there that are bad at the game. Not because they are abusing women or remaining in gangs.

Not every bad DM is a jerk. Most are just inexperienced or just haven't learned how to be good DM's yet.
Or do you believe that good DM's come out of the forehead of a player, fully formed, complete with all knowledge of how to run a good game?
I dunno about you, but, I used to be a very, very bad DM. All that raidroady crap? DMPC's? Overbearing story lines, etc? Yup, I've done it. That's what pretty much every DM does on the way to learning how to run a game. Which means that there is a long line of players out behind me that probably would call me a bad DM.
On the flipside, I've taken in so many gaming refugees from other tables who have just unbelievable horror stories. Or, even worse, they actually BOUGHT the crap that their DM was selling and presumed that that's the way the game should be.
I do agree with one point though. Bad DM's are bad because they are bad at the game. But, unless you figure that almost all DM's are good at the game when they first start out, then there has to be a pretty significant number of DM's out there that aren't very good. They might get good, if they stay in the hobby long enough AND they spend the time and have enough self-reflection to learn. But right now? Yeah, they're bad.