Sure, he hates Laurence Olivier's Hamlet but that's because he thinks its bad; he was still excited to see it. He says the nice thing about Phoebe is she can tell a good movie from a bad movie, implying there are good movies. He talks about people who laugh at the wrong parts (Brossard and Ackley), implying there are right parts. I hear you say "Caroline, these are such picky points. He probably still dislikes most movies, even if its not every single one". And I hear you. I still got the impression throughout the narrative that Holden seems exactly the kind of person inclined to like movies, because he's constantly casting himself in them.
Holden likes ideals---especially if they can remain unchanged---and images that represent those ideals. He starts fights he has no intention of winning so that he can be the guy getting beat up by a bully without hitting back. He values martyrdom (as we see from his admiration of James Castle), so he puts himself in that role even if that image gets ruined when we pan out and see Holden is the one that started the fight. He likes to paint himself, despite being a 17 year old, as a weathered and jaded old guy. He laughs and thanks them when bartenders ask how old he is, and he claims that he smokes far too much and is trying to cut back. When he's talking to Sally Hayes, the way he describes running away sounds less like a plausible reality, and more like he's got a movie script and is trying to cast Sally and himself in the lead roles. Also, the way he romanticizes people feels like a movie too. Its all expositional details, the kings in the back row, and never the broad strokes that most people would use to describe a friend to someone who doesn't know them.
The overall effect produced by these things is weird. On the one hand, Catcher in the Rye is a work of fiction, and thus I should not be surprised it contains the conventions of fiction (show, don't tell, etc). But on the other hand, it really does feel like it's Holden and not just Salinger who utilises these tropes and tools of works of fiction. Maybe Salinger is only trying to hint at Holden being a natural writer, but for me I kept being struck by the feeling that Holden (being so well versed in and inclined to use the conventions of storytelling) watches a lot more movies than he'd like to let on.