"the movie was so bad I walked out after 15 minutes." To be honest, there were movies I wanted to walk out after 15 minutes, but stayed. The only movie I ever walked out of was "Peter Pan!" I took my young niece and she got scared when Captain Hook attacked Peter near the end!!!!
My pet peeve, however, are people writing bad reviews for movies they haven't seen. This happened with the new Captain Marvel movie. Immature people wrote bad reviews making up reasons for hating it. Simply, they did not want to see a major female Super-Hero. Rotten Tomatoes changed their rating system on account of this.