I like their stuff from all periods, but I admit there’s more I dislike that got released in their late period.
As for the “Run For Your Life” controversy, Lennon and McCartney when, in their songwriting mode, imagine a situation and then write a song about how someone would feel or what they would do or want in that situation. It wasn’t necessarily auto-biographical. Nobody accused Paul of really being a young woman who ran away from home to be with a car salesman, right? So, for RFYL, I figure Lennon imagined a guy in a fit of jealousy, cranked the jealousy up to 11, and wrote a song with the lyrics being this character’s angry screed. And lyrics aside, it’s a catchy tune.
I figure the early Beatles were about learning about recording studios, mixing stuff, arranging, and songwriting. And through sales, earning some clout. The middle Beatles were about “What else can we do in a studio?”, “Well, why NOT try this?”, and writing more than just love songs. And they used the clout they earned in their first period to get George Martin and staff to try the new ideas. And the late Beatles was a lot of “We’ll do whatever the hell we want to do; try and stop us.” And it was less of The Beatles and a lot more of John and the Beatles, Paul and the Beatles, and George and the Beatles. That and striving to turn down some of the studio tricks they did in their middle stage. Their stretching of their songwriting wings (no pun intended) was a bit more sporadic, though they did some really good progressive stuff.