The game was a mess, and had a large revolt of D&D fans clamoring that it wasn't 5e. So you have people reporting software bugs, and people reporting what appear to them to be bugs because the designers aren't following the 5e rules...or any version D&D rules on most of the occasions where that sort of problem was reported.
There were many, many people demanding refunds, and much venom was spat between the D&D fans and the gamers who thought D&D was an uh...boardgame. Non-fans? I'm not sure what to call them.
It was an ugly ugly weekend.
They did right by everyone pushing the game back, and there was some delicious trolling of those who whined about it. It's always great to see others get browbeaten for their impatience, especially when the developers tell them point blank that the end result will be of higher quality.