Those don't work. Didn't investigate that further. But it helped to solve the problems on the laptop. Debian doesn't like non-free code so the Radeon R600 drivers weren't installed. After adding those both Wine and the visplayer works good. The latter is a tad faster but overall it is now comparable with Native Windows.In regard to your performance issues:
Its should be not this bad in a VM. In virtualbox... you did'n forget to install the guest-additions, or?
Thanks for the hints. I can now say that installing wine 3.0 in Debian 9.4 and using the DRM drivers is enough for this game to work in Linux.