but they had to fill it full of American actors who can't be bothered to have an English accent.
you're all complaining about Americans and their accent in Robin Hood, but is it all this important? The thing you see even more often is Germans/Nazis talking English (usially with American acent) ...

And if you want more, the language used by the Polish paratroopers in "one bridge to far" isn't Polish. I believe it was supposed to be... I know what they are shouting, but ... let's better listen to American accent in Robin Hood

And a similar thing which made me laugh was a western in which I heard "Auf wiedersehen, Winnetou". I almost fell down from the sofa...

And bad movies? I don't remember too many now... even though I've seen a lot of poor ones.
I never managed to finish the first episode of Star Wars - Jar Jar was more than I could bear...
Matrix 2 was just a display of special effects not a movie, IMO.
I liked The Brothers Grimm because of its dark scenoggraphy and mood. I found it funny in several moments, too.
Scary Movie - seen two of them and don't know which one was worse. Both were as bad as I can only imagine. Definitely they would be among my top picks.
Ah, I know - Van Helsing also disappointed me. Really disappointed me. Stupid ideas, poor execution... Not my ikind of entertainment. I even prefer old horror movies from the '20s and '30s.
And there was also one of Polish 'superproductions' (you probably don't know it, but it's nothing to regret) called Ogniem I Mieczem (With Fire And Sword) which turned out like total crap. Bad choice of actors for some characters, bad acting, poor special effects, and totally stupid scenes. For example a regiment of Polish heavy cavalry (17th century), strictly speaking - hussars, charges across a relatively small puddle of water and mud and the horses fall to the ground, trip over, etc. But it is plain to see that it would be very easy to run around it...
In the original book the whole ground was damp and muddy, so the cavalry charge wasn't successful. In the movie it looks stupid. And there are more of such things. But OTOH some of the characters are really well portrayed and acting is excellent sometimes.