Why the hate for mcintosh amps?

Because,  McI is PP amp with sharp and metal sound and big power, that you never will use. Too much money for good vision and big power. Better try to listen Single Ended amp and you will sense the difference.

This discussion seems to quickly lose rational basis, so going back to the original question, "why don't people like McIntosh?", some rational reasons not to like it are as follows:

1) Value - at the surface, it is expensive compared to most similar products with similar specs.
2) Looks - if you don't like the McIntosh look, you don't like it - what is there to debate here?
3) Sound Quality - again - this is a matter of personal taste.  If you don't like the way it sounds, why would you buy it?
4) Build Quality - the quality of the components, how those components are put together, and the QA/QC that ensures the consistency of what was intended by the designers vs. what ends-up in the box you buy.  In my recent experience, McIntosh is not as good at this as they once were in this regard.

Conversely, some reasons to like it:
1) Value - when you consider the substantial resale value (should you decide to upgrade within McIntosh or try something else later) it is typically a better "investment" than most brands.
2) Looks - see above - my own polling on this over the years has shown that most think it looks very cool, retro, and "pro" - males and females both.  This criteria should be irrelevant, but most of us are at least partially moved by this element.
3) Sound Quality - this is pure personal preference - do not make any significant audio purchase without listening for yourself, and try to do so in an environment that mimics your home listening room to the greatest extent possible.  That said, in my experience, at least as many people like the sound of McIntosh as dislike it.
4) Build Quality - while it may not be what it once was, it is still very good for the most part - especially once you are in the stainless steel chassis line of products.

I hope this helps.  There is no "fatal-flaw" in buying McIntosh, unless you listen to it, don't like the sound, and then buy it anyway.  Conversely, if you like the sound, there are few brands of equipment that have enjoyed lasting value and performance over the decades the way McIntosh has.

@mhwilliford - My vote is for 1A. Much of the cost goes into the look/meters IMHO. In terms of 2A, nobody looks to buy stereo equipment as a positive investment. If you are already thinking of getting rid of it when you buy it, something is wrong.

I always wanted some Mcintosh equipment for some reason and finally bought an amp and preamp several months ago.

Doesn't sound any better than the B&K stuff I replaced but like the looks and love the tone controls but way simpler for the old lady to operate so she isn't always bugging me.

@ norton

Domestic bliss is priceless!