In one word: overrated. 
I can admit that it wasn’t as terrible as I thought at the start, but it’s definitely not a masterpiece or one of the best books ever. Honestly I considered dnfing it but I wanted to finish it so I could a) say I’ve read it and b) properly trash it. 

If this was released today and critiqued as a piece of literature, I don’t think it would get good reviews. I will never understand how this is some people’s favorite book. 
The actual process of reading it was not fun and not worth what little I got out of it. Sure, there’s some interesting (although in my opinion pretty basic) reflections, and Holden is a somewhat interesting character, but beyond that, there wasn’t much substance.
I feel like if it was at least fun to read I would’ve given it a pass for not have any like “lesson” or “deep meaning”, although I would still not consider it one of the best books of all time. I probably just have very high standards for classics, I mean something had to make it so popular and everlasting. but this was not that good. Honestly I only actually liked the last part, but the rest of the book was quite a bore. I dunno, I kind of get the point of it, but it wasn’t for me.