Kingdom of Heaven and Troy. The person who thought Orlando Bloom was an acceptable warrior in the times of the Crusades or in Troy was sadly mistaken.
But, wait! There's more fail!
Kingdom of Heaven: No one of that time would have made an inclusive speech about how the Holy Land is really everyone's land, and one site is not more holy than another. They just didn't think that way back then. It was "my way or I will firebomb you into the Bad Place my religion says you will go." It was so pandering to modern sensibility that I wanted to gag.
Troy: If Paris had crawled back to his brother like that, Hector would have had no problems killing Paris, because a man in that time could never look "weak" in that way. Okay, there were probably atheists in Troy at some point, but no one of Hector's standing would have ever disparaged the gods in public - that was a good way to become a pariah at best and very dead at worst. Also, the names are "Men - uh - LAY - us," "PRY - am," and "Puh - TROK - lus." Not "Men - uh - LAOS," "PREE - um," and "PAT - rok - lus." It makes me want to shake whoever was consultant on that film every time I hear those names being mangled. I bet that next time a Greek myth movie comes out, I'll hear someone in a film unironically refer to "Her - ACK - uhls," (Herakles, pronounced "HAIR - uh - klees") and I will be on the floor, laughing so hard there are tears in my eyes.