I cannot just sit back and let you hooligans diss my John, Paul, George, and Ringo!

Justice must be served!

The Beatles were incredibly original and basically invented rock music.
No, not rock 'n' roll, rock.
Pop music with a strong backbeat.
They revolutionized music everywhere with psychedelia, introduced Indian music to the west, and created transitioning songs for the first time in mainstream/pop/not-classical music. They also released the first album to show lyrics of songs.

And whether you like it or not, men having long hair was not socially acceptable in the Western world during the 20th century before the Beatles. Then came hippies...

Anyway, how can you not like them? They just simply made good music.