It depends: Is the opinion based on parodies from American popular media, or is it based in hearing actual native German speakers speaking natively? If it's based on the former, then, yes, I suggest they're misinformed and basing their opinion on untruths and ignorance, and therefore, yes, wrong. If it's based on the latter, well, de gustibus. French sounds like a guy with marbles in his mouth to me, but, oh, it's the Language of Love! So beautiful! Whatever. (My organic chemistry lecturer in Germany was a Frenchman. He lectured in German. It was very strange, and it took a while to understand him. He was from Alsace-Lorraine, so he had a German-ass name: Paul Knochel.)

The majority of people I've encountered who say that German is harsh or ugly fall into category A, and think Castle Wolfenstein is representative of real German.