(Edit: Iirc)

Debian-variants on cmake. When I install cmake, it installs all libraries' cmake files without the libraries themselves. You read it right. The correct way to do this is to install only the base CMake files (Arch does this, and I guess all other distros). CMake configuration files for libraries should be packaged with the library (not CMake).

Whenever I use CMake, these distros can't show me the supposed error message. They just pretend configuration progressed and stop at random moments because some headers are missing. You see a compiler error, see missing headers, perhaps wonder if your install is outdated. Google it, and find out through Ubuntu SO that it's actually that a package is missing WTF. Without someone writing it on the web for all Debian packages, maybe you'd have never understood what's wrong!

I don't use Debian for C/C++ development anymore partially because it's so horrible.