I wouldn't be so absolute about it, but I certainly empathize. Any time a candidate told me they were an expert in C++, it didn't go well. I think that suggests

I wouldn't be so absolute about it, but I certainly empathize. Any time a candidate told me they were an expert in C++, it didn't go well. I think that suggests they are either wildly overestimating their abilities or are too interested in being "clever" and using weird corners of the language that aren't necessary/beneficial for the problem and that no one else will understand. Probably both.