I don't really hate any organisms per se... the one thing that creeps me out are cockroaches, so I "hate them" in that way, but I acknowledge the fact that some species are actually quite beautiful, and their biology is absolutely fascinating. So other than my personal irrational dislike of roaches, this list is just for groups that irritate me and I refuse to try to ID them. Either because they are too speciose and I don't feel like looking through the species to try to ID them, because they are an insufferable pain to ID due to the tiny ambiguous details you have to pay attention to, or because two or more supposed species have large geographical overlaps, are nearly identical to each other, and/or hybridize with each other.