Well, it's not only about her but, let me explain:
"Had the Beatles mostly done stuff like their more adventurous songs, I would probably enjoy them more."
Beatles wrote simple songs that are great as their adventurous ones. I get that it's subjective and all but i don't think complexity makes songs better than others.
"But, the Obla Di's, Paperback Writers and All You Need Is Love's kill it for me."
What is Paperback Writer or even All You Need Is Love doing there?
"Like, they're well executed and stuff, but it's still 60s boy band material. Might as well listen to Katy Perry."
60s boy/girl bands still produced legendary songs, something i can't say for modern equivalents.