I agree I was a bit unfair, in the sense that it's not a problem specific to C++. It's extremely tempting for developers to use all tools and features available

I agree I was a bit unfair, in the sense that it's not a problem specific to C++. It's extremely tempting for developers to use all tools and features available to them, and without very strong guidelines, you can be sure that it will happen. That being said, C++ is an extremely complex language, so there's much more room for the code to become insanely complex than in more modern languages.