> I quite like modern C++, so I really tried to make it work for gamedev, but I think you can't really do it.
What exactly do you mean? What parts of modern C++ did not work for you?
> You can use all the modern C++ features that are not in the standard library though!
> I just decided to not use any of the C++ standard library (I just use a few C headers)
So what do you do with C++ that C alone couldn't do?