McIntosh is among the longest running of successful companies producing specialty audio components, and that success combined with a substantial following has predictably caused a polarity among audio enthusiasts regarding their merit as high end components. For some people it may not reproduce music to sound the way they like, or its functions and appearance may seem outdated if the preference is for modern minimalist. Some might not have even properly heard McIntosh and are simply parroting the opinions of other enthusiasts with whom they trust. And yes, some people are just jealous of things that are beyond their means to obtain.
Yes I personally have heard the haters, as well as the numerous folks who truly understand our deep appreciation for the design, the engineering, and of course its superb musical reproduction. I've been into high end audio for 40 years and nothing else has fulfilled my preferences in design and musical reproduction as well as McIntosh. Certainly there may exist components that could please me more, but I've not yet heard any. No doubt I sound like a biased and loyal fan, but for me, McIntosh has earned it.