Pretty muchthe same reason some people don't like Brussel Sprouts.
It all boils down to personal taste. And, from my dealings over the years I'd say that a great many other people don't like 'em either.
But, there's not too many Brussel Sprouts fanboys crying over that and claiming the whole world is against them. (not directed at the OP)
It's not that they are "bad" speakers, but for many, many years they did have a distinctive sound. Many people do like them and, God bless 'em, there's nothing wrong with that. There are enough different sounding speakers to please (and displease) almost everyone. Ya pays yer money and ya takes yer choice.
And, their dismantling of the API brands (Athena/Sound Dynamics, Energy and Mirage) doesn't sit too well with me, either. To my ears, API produced better sounding speakers