I also encountered that when I set up a Samsung phone for my dad. And I also got Facebook preinstalled on a Samsung phone a few years ago.
useful features like Dex
I really don’t mean to insult Samsung users or to make fun of Samsung software, but have you ever used Dex? In my entire time of using a Dex-compatible Samsung phone, I didn’t touch this feature once. It reminds me of what Microsoft did on their crappy Windows Phones with Continuum. Who would ever use something like that?