Just to be the annoying person and point it out: it’s Linux. Not windows. So things will feel weird or strange, for you (and the wife) will be learning a new OS. Give it time.

You can get protonGE, which is more optimized than the ones you get through steam. So maybe it’s worth a shot to try those.

So what are the NVIDIA drivers you have installed right now?

Opensuse Tumbleweed or Leap? Have you tried using ProtonPlus?

The fossify agenda supports dragging, but not extending afaik

Vivaldi ?