According to the Wikipedia entry, "Lennon designated this song his 'least favorite Beatles song' in a 1973 interview, and later said it was the song he most regretted writing."
I can't say I blame him for regretting it. I can see where he's coming from--I'm fairly notorious for my insecurity in relationships. But I'm much quicker to attack myself than to threaten the other party.
Of course, I already knew John Lennon was a jealous guy from this song;
As you can see, much like Matt Lauer, John Lennon's trying to dress like me. Oh, heavy is the burden of my interdimensional fashion influence.