He was of the rather silly school who think that Lennon was cool and great because he was 'edgy' and dead, while McCartney was hopelessly uncool because he wrote a great melody and was alive.
And yet it was McCartney who wrote Give Ireland Back To The Irish, and Lady Madonna, an anti Catholic polemic. Fool on the Hill, a poignant study of alienation. I think McCartney was the superior writer in addition to being the superior tunesmith