The Beatles were an unprecedented phenomenon in musical history. They changed the music business forever. Hell, they changed society. No one has taken rock and roll farther than them. During their time, they were the popular equivalent of someone like NSYNC while being on THE cutting edge, and we all know that this will NEVER happen again. The biz is no longer the same. Pop stars could not care less about being innovative.
During their time(and they took months rather than years to make an album):
They were the first to demand to write all their own songs and did.
Very Well, I might add.
They were the first to use feedback on a pop song(I Feel Fine).
They were the first to use classical instruments in pop.
They were the first to close mike drums in the studio.
They were the first to play stadiums.
Rather than have this post be hundreds of pages, I'll stop there.
As far as what you like, that is an opinion, and there are lots of great musicians being mentioned here. But The Beatles mark on both music and history is undeniable. 98% of what is out today will be forgotten,as sad as that is. There will always be great songs, but rock/pop as a creative medium is dead. Part of it is digital technology that is available to anyone, and the nails in the coffin include the public's willingness to embrace anything shoved down their throats.
There's no problem if the Beatles' music doesn't do anything for you. It's all opinion. Hell, it's 40 years old! But to say that they are overrated or no big deal is an admission that one doesn't know their musical history.
Peace, Dan