“the Beatles are overrated” is a poorly defined statement often made by people who give the impression they want to be seen as an iconoclast of some sort.

Ok. Overrated on what metrics? Historical impact? Popularity at the time? Popularity now?

“I don’t like the Beatles’ music” is probably closer to what people mean, and that’s fine. I rarely listen to them on purpose. But the whole “I don’t like them, and neither should you” thing is kind of insufferable.