I usually assume when Europeans complain about American beers, they just are complaining about our “domestic” beers like Bud Light, Coors, PBR, etc. which makes sense, they are our bottom shelf beers.
I recently chatted with someone at a party who said “no, all American beers are bad” including microbrewery beers.
I’ve never been to Europe so I wouldn’t know, but I do like my Left Handed Milk Stout, NWPAs, and hell even the hipstered out IPAs.
Are these what y’all are referencing?
Because of the German Purity Law, there isn’t much that German beer can do to experiment or try new things. There are some excellent German beers (Brlo is one), but generally you don’t get the variety that you find in other countries.