This is a case of so bad it's funny, it's issues are so very obvious that joking together about them becomes a bonding experience.
The CGI is archaic and make the characters silly even in serious scenes.
The story was either predictable or disjointed often both, to the point you basically yell at the characters to use their brains.
The voice acting at least in the English version had horrible lipsinc and dumb lines, the princess also sounded like she was trying to be snow white but instead was just annoying.
And they were just lazy with the queen, they didn't even try to explain that
All in all a horrible movie, the dragon tried his best though, sometimes dragons just can't save something.
Review of Princess and the Dragon
