For a regulatory policy course I taught, I used a lot of student interactions to illustrate policy issues and solutions. One of them involved the Beatles -- specifically, groups had to guess whether their group had more Beatles fans than the others. I picked that because it is probably not something most of them know about each other.
I was surprised that about 75% of the students did not like the Beatles.
Anecdotally, my son can't stand the Beatles; neither can his girlfriend (I had no formative role for her). My brothers do not like the Beatles. I mean, did you seriously think everyone would like the Beatles? Seriously?
The Beatles are in part a litmus test of what you think music should be doing. If you think that rock and roll should basically be pop (not today's pop but what was called pop, say, pre-1990), then the Beatles are good. If you have a different conception, then maybe the Beatles blow.