There is a very real distinction between high and low level languages. And C++ is a nice low level language, but you wouldn’t write a CRUD app in it that changes requirements multiple times a week, because it is simply non-trivial to refactor, due to low level details leaking.

Are there any good full-featured C++ web frameworks? Comparable with Rails, Django, Spring, .net, etc?

Drogon (https://github.com/an-tao/drogon), Cutelyst (https://github.com/cutelyst/cutelyst/), Crow (https://github.com/CrowCpp/crow) come to mind