[fotcorn]

The best way to swap desktops is to install the correct Ubuntu flavour from the start, i.e. Kubuntu, Xubuntu or Lubuntu to avoid those problems.

I am quite happy with Regolith Desktop [0] installed on top of standard Ubuntu. Gives you a nice tilling window manager based desktop without fiddling with config files for hours.

[0] https://regolith-desktop.com/