People that belong in the job, even the creator of C++ himself, take decades to mature to the point of daring to use the language properly and then teach it. C++ is not meant to be learned in a week.
https://www.reddit.com/media?url=https%3A%2F%2Fpreview.redd....
I have never spend more than a few days learning a language.
I have spent decades mastering several of these.
Any language that takes longer than a few days to learn the basics should be avoided, it will always be difficult to use.
APL being the most famous of such a language.
You can put Scala on that list as well.