Well, my experience was a little different--I didn't grow up in the NY area, have never heard Scott Muni, and recognized that "Disco sucks" bit for the racist claptrap it was from the start. But no one will ever convince me that ABBA were disliked because they sounded too Negroid.
"Perfectly crafted"? I dunno--compared to what? "Be My Baby"? "Watching the Detectives"? What's an example of an imperfectly crafted song, as opposed to one that just doesn't work for you? I don't even find the songs that catchy--I owned a copy of Gold for a few years, trying ineffectually to hear what Elvis Costello heard in it, and apart from "Dancing Queen" I couldn't hum any of them for you.
But more than anything, what I dislike is the perfectly vacuous singing, which belongs to the sugary-earnest tradition of Rodgers & Hammerstein musicals, advertising jingles, and Karen Carpenter up through Celine Dion and Susan Whatsername, you know, that dowdy English lady from the TV show. If you can listen to the vocal on "Chiquitita" without throwing up in your mouth, you're a stronger man than me. Yeah, the songs are loaded with emotion alright--all of it completely unconvincing.
Still, love for anything without one shred of irony or sarcasm is a good thing.