You kinda can't, and that's the point people are angry about. I never personally cared one way or the other about snaps. But it is not at all acceptable that Ubuntu will sometimes install a snap when I explicitly use apt to install it. That was the moment I decided I'm not gonna use Ubuntu any more: they started to override my decisions about what to install on my computer, and that isn't ok.
You kinda can't, and that's the point people are angry about. I never personally cared one way or the other about snaps. But it is not at all acceptable that Ubuntu will sometimes install a snap when I explicitly use apt to install it. That was the moment I decided I'm not gonna use Ubuntu any more: they started to override my decisions about what to install on my computer, and that isn't ok.