Key point! "...just because I'd prefer Sue over Chuck it doesn't mean that Chuck is a bad DM."
There's so much mischaracterization and willful denial of other points of view in this thread. I'm getting the feeling this is far more about personal trauma than bad DMs.
If every new DM is bad, if every DM that doesn't have instant recollection of every rule is bad, if every DM that isn't a professional voice actor who happens to DM is bad, if someone at the table doesn't think the DM is as good as they believe the DM thinks they are, I don't know how any DMs could ever meet all those criteria and not be considered "bad" According to the poll 9% of the people answering believe that. If those 9% were correct I see no way the hobby would survive. I also don't think there's any solution to those people who believe that almost all DMs are bad.
For me? If we are having fun at the table and enjoying ourselves most of the time, the DM is not bad. Even in those cases the reason we're not having fun the responsibility rarely resides fully on the shoulders of the DM. Sometimes it's another player and sometimes whether we like to admit it or not it's in large part due to us. Not sure what else to say.