Songs I hate....well...any song done by the GO-Gos for starters.
As for McArthur Park...well...I kinda like the melody. It has, I think a good arrangement, particularly the parts with the major seventh chords. I once saw Andy Williams do it on his variety show. The part of the song where the horns come in sounded great with the orchestra horn section at full blast. What can I say gentlemen, I like a good melody.