I made switch back to Windows some time ago, but I notice I use open-source programs anyways and I do not enjoy modern video games which is why I think about switching back to Linux. Below is two issues holding me back from switching right away;
1# What desktop should I use… I used GNOME before but because NVIDIA card it did not perform well. I also tested KDE but it was too complex for me. Should I try Elementary OS, Budgie, XFCE or Mate ? I look for something simple, modern, customizable. I do not have time to test what fits me blindly.
#2 Is there alternative program to simple wall (pp) ? For by default blocking apps from connecting to the internet.
XFCE for performance Mate or Cinnamon for the windows-like experience Gnome is probably the most resource intensive. In any case, depending on how long ago you had issues, it may be the case they have been fixed (unless Wayland is your thing, I think)