Worst American movies aver seen are the ones with crazy aliens attacking USA, crazy asteroids wanting just to hit USA, crazy, earthquakes, tsunamis and whatever natural or artificial thing wanting to wipe out USA from the face of the earth. Movies portraying terrorist full of hate toward USA using a bunch of weird stereotypes of countries and peoples. For example all Russians are communist and like vodka, all Arabs simply dream to die in the name of Allah, all people of Balcans are ex war criminals guilty of some genocide and making gun traffic. All Italians have connections with mafia and like spaghettis.
Well I also enjoy the stereotypes about my country. You can still find vampires here and the big vampire boss Dracula actually born here in a dark castle. Nevermind that such a thing as vampires never existed in our folk stories and there is no local word to describe such a creature in our culture. And the guy that supposedly is Dracula lived in that castle 2 days in his whole life being prince in another region.
There is also something absolutely annoying in some American movies. Actors who play the role of a foreigner ans start to speak supposedly his/her mother tong. I saw a guy trying to speak Italian and It was like he was speaking klingonian. In Dracula for example the main character tries to speak Romanian and it's absolutely crazy. In Gladiator the child of Maximus speak instead of Latin Italian and so on.
So stupid movies:
Dracula
Godzilla
Peacemaker (for the scenario )
Rambo
Hard to kill no. ...(really annoying movies)
Movies with sharks that love to kill humans as a full time job
Battlefield Earth
Species
Chucky , bride of Chucky and so on... not even good enough for a comedy