As they say,
node what you know.
There is plenty of American beer that is quite good, if not excellent. The problem identified in this node seems to be not with American beer, but with bad American beer.
May I suggest the following as decent brewers of American beers.
Sam Adams
Sierra Nevada
Pyramid
Celis
Saranac
Rogue
Saint Arnold's
Anchor Steam
Red Hook
The list could go on and on.