I can't honestly say the Beatles are just flat out shit. They were very good at what they did, they wrote songs that even I find catchy despite hating them, broadly speaking.
My problem with the Beatles is compared to everything else that came out of the 60s, there was just nothing that special about them. They were a polished pop band.
This is compounded by their legions of fans today who weren't alive back then (I certainly wasn't) who think they're the best band ever and even that they were "deep" songwriters, and for that they usually reference Lennon in particular. That John Lennon is a huge symbol of peace today is a joke to me, because his songs were middle school level compared to others at the time and the guy was a huge fucking asshole. He was a closet gay who liked Yoko because she looked like a guy, he beat all the women he was with, and he actually thought he was some kind of man of destiny because he wrote trite songs like "Imagine." He was also a junky but I think his drug use has been overblown in an attempt to make him look more edgy. He's no Townes Van Zandt.
I could go on, but every time I criticize the Beatles some asshole comes out of the woodwork to say "Well, man, you should listen to some of their deeper stuff." or "Try this song or this album and it will probably change your opinion."
Oh and I also read somewhere that members of the Beatles hung out with Jimmy Saville and might have also been into fucking kids, but I think that is just a rumor?