I would read my post here:
and here:
before proceeding with attempting to uninstall any programs. Not all of the problems in the first post will be applicable, but suffice it to say (seemingly) conflicts arose after trying to unistal certain programs via terminal, especially if they were listed in the GNOME “app store” (or whatever version is installed on PureOS by default). In the process of trying to solve the problem, perhaps I made a misstep, but it led to massive errors from terminal output that prompted me to wipe the hard disk and start over. I had a very similar issue to what you are describing with my own mini v2, and it prompted me to try switching to another OS. Make sure that you have updated PureBoot before you proceed with wiping the filesystem, otherwise you may run into problems as outlined in my second post, which I am still dealing with.