Two bad movies come in mind for me, and here is why:
1. Adventures of a Teenage Dragon SlayerSo get this, me and my best mate were at the video rental store. I think it was like... I dunno, five years a go? Around when video rental stores were going out of business but privately owned ones were still on it's last legs. So me and my friend were in the mood for a high fantasy adventure. Something with dragons, monsters, medieval fantasy, the usual works. While we were contemplating favoured classics like Lord of the Rings and Conan the Barbarian, we wanted to see something new we haven't seen before. We saw the cover of this movie and we thought it looked promising.
https://www.youtube.com/watch?v=9gS8cgcBvWgWhere to begin... I suppose for a start the cover looked nothing like the movie. The protagonist not even having the same hair or even sword or even dragon on the cover. I can't remember how bad the acting was in most of the movie but it was forgettable. Then there was this blue motherflippin' "troll" character who spoke with a bad Smeagol voice and had a dance number because OH LOVEABLE AND FUNNY!
I remember this scene where a police officer in sunglasses stopped, I think it was a mother in her car, tells her to drive safely or something, I can't remember. What me and my friend did remember is when he took off his sunglasses the movie had a "woosh" sound and that was it we were laughing our butts off at that movie.
But yeah. Terrible movie. A "Don't judge a movie by it's cover" moment because it's probably where most of the budget went.
2. A Fairly Odd Movie, Grow Up Timmy TurnerSo I was originally a fan of the Fairly Odd Parents series. After I saw this movie I never watched Fairly Odd Parents ever again. The movie was so bad that I put as much mental effort as I can just to forget this movie, and the moment I am reminded of it I throw a tantrum over the fact this movie exist.
https://www.youtube.com/watch?v=XUA2YB7brWoLive-action movies that try to emulate cartoons rarely work. I can't recall a movie that did so successfully without being heavy on the CGI. This was one of them. The movie was scripted as the cartoons would be but the cartoon antics just doesn't follow through in live action and just look super-super cringy. If I had godparents I'd wish this movie or it's live-action sequels ever existed.
Anyway those are the two movies I hate the most. You can probably watch them for free on YouTube if you want.