People hate on things for any reason... sometimes just because other people are hating on it. Others because they get killed with it in general. Some people think that rather normal legendary guns are "OP" and should be nerfed: vacancy, susanoo, etc. Does that make them correct just because they have strong feelings? MIDA was pretty much the same gun for at least a year... and people only started using it often and complaining about it within a few recent months. Like all of a sudden it magically became insane.