slic3r doesn't work properly

Buliding correct support in slic3r seems to be impossible.

In the versions below 1 it simply ignores the Angle (45°) when building a support structure. It just adds support everywhere.

In the versions above 1 it builds the support only where i want it, but it only adds it on every second layer. This way it starts hanging and dropping.
Maybe there is a configuration where i can add the support to every layer, but i couldn't find it so far.

I already tried 'cura' and i'm now considering 'kisslicer'