If you’ve just installed Ubuntu, stick with it for a bit. Get things set up the way you like them. Make a mess if you must. But don’t switch because someone on the internet said one is better than the other. Lots of the Linux sites are just content farms (that 9to5 site) and copy other sites and then people read those and they suggest what they read.
Mint does have some bespoke tools that users like, but those tools can be installed on other distros.
Anyway. First, play around, make a mess, clean it up, get used to it. Then figure out how to backup the configs before you reinstall a new distro.
Other beginner distros are Zorin and Elementary.
I’m a Debian user myself, but I’ve been around and have tried many different distros, WMs, DEs, etc. over the past 19 years. Keep messing around and you’ll find your comfort zone.
Hi
Did you remove wireguard the meta package or everything wireguard installed? I don’t know Pop but other distros install additional tools and configs like wireguard-dkms.
Also, if possible, after completely purging every wg you could try booting into a previous kernel on your system to see if that changes anything.