Could have been installed as a dependency of something. https://ubuntuhandbook.org/index.php/2022/04/remove-snap-block-ubuntu-2204/ You can also make sure apt won’t install it again

Dumb question time: Which distro is this, and could there be a better option?

(Linux Mint deliberately removes Snap from stock Ubuntu, for example, but they dropped KDE a while back, and I don’t know if anyone has got KDE running or not.)