I was with this show until...
the kid turned into a Titan. That's fairy tale-level magic. You can't spend so much time establishing a world and its rules and then suddenly change everything up to that level. If the world were a literal dreamland, such as Oz or Wonderland, where nothing is supposed to make sense, then I could buy that, but there was nothing to suggest that world had fairy tale rules up to that point, other than the size of the Titans.
Never say "Worst movie ever" to someone who's seen Highlander 2