Gone with the Wind was pretty tedious.

Not a movie per se, but John Wayne was a pretty shitty actor. I prefer James Stewart.

Almost all of Elvis' movies were pretty terrible!

Citizen Kane. It wasn't the best movie ever made even back when it was made, and it's been bettered countless times since.

Anything by James Cameron. His movies blow. Yeah, they make a lot of money, but they
still suck.
I hated Titanic and Avatar.

There are plenty that I think are overrated, but the big one that I think actually sucks is Gone With the Wind.

It's a bit more along the cult classic side of things, but the popularity of The Goonies seems to be more from nostalgia for those that watched it as kids than it actually being a good movie.

Did not like Monty Python and Holy Grail - not my type of humor
Did not like remakes of Dirty Dancing, Footloose, Hairspray, Fame

I thought the Godfather was utterly boring.

Sound of Music and Gone with the Wind..

I hated Clockwork Orange. Just one long string of edgelord nonsense and tryrealhardism in my opinion. I found Fight Club to be painfully boring, too.

2001: A Space Odyssey. It was visually stunning and technically brilliant but I didn't get it. Saw it some years back at a revival theater with a friend, and we both turned to each other at the end with stupifying looks on our faces and said, "What was THAT?!"

I thought A Clockwork Orange was an amazing film. So, SO far ahead of its time.

Ha, I can't think of any classic movies that suck. Reading through the comments, I like ALL of the movies mentioned. Perhaps I'm easily amused. ?

Star Wars

ET. No, it wasn't a bad movie, but it wasn't that good either and yet, it got awards. Why? Very dry movie season.

A word on Clockwork Orange. The reason it's a classic is not because it is cast with such strong scenes but because of what it said about society and how we treat criminals. It was a discussion point of the possiblity of controlling criminals and how it could go wrong and how it would be wrong if we were to use it... or would it be? When I realized that, and rewatched it, then the movie took on a different sense to me and held a lot more value. Yes, it's still a 'strong' subject presented in a way that is intended to jar your emotions, and delivers on same... but, it causes me to stop and think about things more than to just react.

Yeah Clockwork Orange just leaves a bad taste in my eyes. I personally don’t like Reservoir Dogs either. Although there are small nuggets of gold in it. As a full I’m not that into it.

Citizen Kane. Nothing else comes to mind at the moment.

Any zombie waste of time.

Scarface

The Ten Comandments

Forrest Gump. Not sure if it’s old enough to count as a classic. This is by far the dumbest movie I have ever watched.

The Wizard of Oz.
I love most classics: Sound of Music, West Side Story, Casablanca, A Raisin in the Sun, The Matrix, The Godfather, My Fair Lady, Brigadoon, etc., and before I had cable, I'd watch them whenever they showed up on TV. But The Wizard of Oz?...meh.
Never got that jazzed about it.

‘Raiders of the lost Ark’… ‘It’s a wonderful Life’.. ‘The exorcist.’ Have I a theme here?

Singing in the Rain and The Sound of Music always come to mind when I'm asked this question.

Those are three of the greatest movies ever made. you must be brainwashed if you think otherwise. All offence intended...