Have never understood why people despise "Ebony & Ivory," which here is described as "abysmal."

Is it just the overall sweetness that to many is mere kitsch and saccharine?

Is it like getting (what do the kids call it) "rickrolled" or something?—once everybody decided to hate it, the ridicule took on a life of it's own?

Would sincerely love to hear what the song's artistic demerits are. Been wondering this for years and years.