Dex mode is awesome , the hardware of Galaxy is nice too but unfortunately I cannot install a private ROM like GrapheneOS or Calyx, for me this criteria is above all benefits that a Samsung Galaxy can offer me
That is a sad reality when it comes to samsung. Beat you can do is adb the apps away you don't want, and use rethinkdns (firewall) combined with the dns of them, nextdns or decloudus.
Is not GrapheneOS, but it's a little more private as out of the box.