Important to note that German is a very tricky language to speak fluently. In this case, fluently meaning no grammatical errors. Also important to note is that

Important to note that German is a very tricky language to speak fluently. In this case, fluently meaning no grammatical errors. Also important to note is that Germans are uptight about sentence structures being flawless. Of all the countries I lived/visited (US, England, Turkey), the Germans are most uptight about people speaking their language correctly. I have heard similar stories about France, but I don't know first-hand. The complexity of the German language combined with the expected level of competency lead to non-native speakers being thought of as less competent or not integrated enough for the German society.