It’s beyond obnoxious. It’s your computer and there’s no way to disable it from mutating without file system hacks?
However, Canonical pushes snaps via deb packages (e.g. Chromium).
The best option is the use an Ubuntu-based distro, like PopOS or Linux Mint or Elementary OS.
I wish they would have based it directly on Debian instead of Ubuntu, but I just stay away from Snaps and get on with my life.