My cousin gave an old acer switch that she wasn´t using, its extremely underpowered with 2gb of ram, an old atom and 32 gigs of storage. I tried ubuntu with gnome because thats what i use on my main laptop and while it has amazing touchscreen support it barely runs. I then decided to try lxqt and it runs great but the touch support is really bad. Does anyone know a DE with a good balance between performance and usability? xfce doesnt really seem to have good touch support either and tbh i really dislike it.
Just to add an offering that is not KDE the beta linux mint includes gesture support which is good for touch. In terms of usability it depends on what you want. If you like phone UI than GNOME with something like Ubuntu or Debian will be better. If you were alive in the 90s and liked the “traditional” desktop than something like KDE or Cinnamon(Mint) will be more comfortable.