I'm consistent. I've never truly complained when they've really helped. It's when they've loafed or benefited from the sacrifice of others, and been, frankly rude towards US forces in Germany, something I've witnessed many times, that I've felt they're the ingrates. But hey, if they'll help a bit, we should not complain. They're doing the best they can.
They've been rude to you? LOL Why am I not surprised?
I lived there for two years in the Army in the 70's, vacationed there three times in the 80's, and worked there several weeks in the late 80's and again in the early 90's. I've never, ever, had a German be rude to me, except one VP of Smith International, when I called him a neo Nazi ass.
Perhaps it's just you?