I have been a McIntosh owner for over 30 years.
I will state that when I would visit stereo / hi-fi stores over the decades (when we still had hi-fi stores!) and salespersons would ask what I had for a system, I was embarrassed to some degree to state that I owned McIntosh due to the comments and that I would get. Not sure where that really came from...other than the assumption that people disliked the colored, house sound from years ago, the logo font choice and the blue meters. McIntosh, seemingly more than any other stereo manufacturer, has indeed generated a fair number of detractors that really dislike these products.
I still remember a few clubs/bars in my area in the '90's that would have a McIntosh amp behind the bar running the sound system. All beat to heck, lights burned out, top of the amps battered for years of setting stuff on them, but still operating year after year.
My mid '70's MC250 amp is still going, and my Clarion years MAC preamp is still 100% functional.