None of that comes activated by default. Sure, there are some dark patterns that trick people into activating bullshit. But anyone with half a brain and a minimum attention span not rotten yet by social media will click no on those prompts. Once disabled at the first startup, Samsung doesn’t bother you ever again. You can uninstall every single Samsung app and substitute with your favorite, no issue. This includes all Google apps, except play services because of Google.

As for ads and uninstallable bloat, it’s probably a carrier version. Those do get bloated and get ads. But otherwise, the international unlocked versions don’t show any ads at all. I’ve never seen an ad in my S25 phone and use nearly all Foss apps. The phone has never refused to uninstall anything. The effort to do that is pretty minimum, no tech knowledge required. Just learn to say no to software, it’s not rocket science. People got conditioned to saying yes to every prompt just to make it go away. This is how they get you. But it is not mandatory or out of your power to disable that stuff.

And for the UI, it’s a subjective matter of taste. I’ve never liked any of the alternative launchers either, they all suck in some minor way that breaks their gimmick. OneUI is fine and perfectly functional, it even has more customization and QoL features than stock launcher and other truly bullshit launchers like Xiaomi’s.