Honestly, instead of trying to remove Snap from Ubuntu, I'd just install another distro (PopOS for example is mostly like Ubuntu but with Flatpak instead of Snap)
Pop is great, even without the wm. The app store is top notch, if you're into that sort of thing. Basically it's Ubuntu minus snaps, so slightly more modern Debian, with good flatpak integration making up for all apt's drawbacks. Perfect for the computer you want to be able to use without dealing with out of date packages or rolling release tinkering.
Even so, the wm is worth taking the time to get familiar with, because it's intuitive enough for a non power user, and you're not going to approach its efficiency in terms of workflow unless you can consistently use several dozen keyboard shortcuts on a more bare bones tiling wm. Anyway, that's my opinion, having used a wide variety of window managers since the 90s.
Been using pop for months now. The one thing I have a complaint about my part has to do with Steam. I was drawn to Pop because it had good Nvidia support out the box. Steam flatpak is fine but it can't do some things that the normal deb version can, such as accessing other drives you may have steam games installed on, or that you want to install them on. You have to make some sacrifices with your library setup and your freedom with it when using flatpak.
It took me a while.to figure this out. I like to share it when I can. The deb version of steam is much nicer to use.
Flatpak steam can do all that. You just have to learn to control the flatpak sandbox. There are CLI commands of course or you can install Flatseal which is a real nice gui that lets you control the sandbox for each individual flatpak app. https://flathub.org/apps/com.github.tchx84.Flatseal
Just add whatever drive/directory/mount point in the filesystem path for Steam in flatseal and Steam can see it.
I couldn't get it going on anything but my steam deck to read SD cards. Flatseal doesn't seem to help. The only thing that worked after a ton of attempts following a ton of guides on my desktop was to get the deb version.
You're absolutely not the target audience for the wm. But... you still might want to be familiar with it, because it could totally be your foot in the door to set someone down that path. The cost of adopting pop's workflow is substantially smaller than creating your own from scratch, but it's intuitive enough to get someone to at least understand why it might evolve to something like your setup.
These days I just don't have enough time, and i've seen enough trends come and go that i'm happy with most of the pop defaults, and it's mostly just dressing for terminal windows anyway. There are totally better options out there, I just don't have the time to invest in one.
And anyway, most Debian and Ubuntu documentation is spot on for pop, which is a big advantage for anyone who is familiar with them or doesn't have the time or desire to solve their own problems.
Yeah! Has good power management utilities and bonus features. but personally I'd stick to GNOME/Cosmic if you had Pop installed. You miss out on that integration otherwise.