Display of Office 2016 corrupt

[freetrail]

Hello friends,
I hope you can help with my problem.
The office interface isn't showing correctly and even the text is disappearing at random (see picture)

I have a subscription for Office 365 Student, and the installed version is Office 2016.
This happens in all programs of the office suite (PP and Excel too)

Things I already tried:
-repair Office
-deinstall and reinstall office from freshly downloaded source


-change design in office
-sfc /scannow

Thanks for your help!