BTW The Beatles were one of the first bands to use the Moog sythezizer and Jimi Hendrix was so impressed by the album Sgt Peppers Lonely Hearts Club Band he learnered to play the song and performed it in 3 days. Lennon/McCartney were admired as being one of the best singer song writers of their generation. Many, many music industry icons have praised the band. Whoever says they are overrated is somewhat misinformed???
An added thought... any musical performer or band has to be evaluated within the contextual framework of the cuture, place and time. The Beatles impacted the 60’s like no other band had done and impacted the generation musically, politically and culturally with humor, wit , fashion and their songs. Whether you liked them or not (Bob Dylan too) they made a mark on the times. Given that important perspective, with even taste aside, they can hold their place. They are not over rated.