You could call that helpful if you're optimizing for fastest transaction. For tourists who might have spent years in school learning the French language, and many recent weeks on Duolingo refreshing before the trip, and who are optimizing for a richer local experience, it's thoughtless and rude. Both viewpoints are rational.
Also I doubt that French is objectively harder to understand when spoken poorly than most languages. Especially when you consider tonal languages like Vietnamese and Mandarin.
Basically if the listener believes that it is difficult, it will be. Additionally, the harder the listener tries to engage with and understand the non-native speaker, the easier it becomes.
French could be unique among languages, but my strong suspicion is that if what you describe is true for most French speakers, it's mostly due to a widespread cultural perception that non-native French speakers are hard to understand rather than objective difficulty.
There is a professor at Georgia State University who's primary research focus is on this topic if you're interested in reading more.
Interesting and intriguing! Thanks!
I now have some lousy Portuguese, so we'll see if the Portuguese people are more gregarious with their language or if they ask me to fall back to French.
Why did you think those people were rude, instead of, say, trying to be helpful?
French is difficult to understand when spoken badly, even for natives (maybe esp. for natives). We don't understand what people are trying to say -- really. We don't try to be condescending: we truly do. not. understand. I get that foreigners / tourists may not believe it, but it is true.