I don't think I proactively "hate" any kind of music, because there's too much that's good to spend time on shit. Unlike bad architecture, bad music can, fortunately, generally be ignored. However, I sometimes wonder if it's possible for bad music to do as much damage to the general intelligence level of civilisation as, say, commercial television. In other words--can bad music glorifying vacuuous consumerist materialism further the cause of over/mis use or resources/time/money/passion?
Most of the stuff I deeply dislike probably doesn't touch too much on that, because most of it is essentially marginal, not commercially persuasive:
* anything that can make the event of music sound lazy and indifferent/ironic, no matter what sounds are being appropriated. 95% of the time this means "indie rock". Especially in the last ten years or so.
* metal, quiet storm r&b, 90% of indie hip hop, 90% of post-Gangsta neo-Hair Metal pop-hop (inc. crunk, 50 cent, Emenim, etc.), post-1960s Nashville country, post-60s electric blues, people who think they're Bob Dylan/Leonard Cohen in their rambling lyrics moments, neo-Hippie music (Rusted Root, et al.), "post-punk revival" (indie does Joy Division), whatever the hell Bright Eyes is, U2-type stadium rock
* anything actively anti-intellectual, especially if it's perpetrated by educated people; though I think I'd enjoy music that were specifically anti-academic, if that were somehow possible.
* probably the one I'd be willing to hate is borecore---Sigur Ros, Mogwai, GSYBE, etc. etc. Tepid, paint-by-numbers banality posing as the avant garde--and being taken as such by impressionable youths, causing them to close their minds further to the breadth and depth of good music.