some of that has been true to my experience with Samsung, certainly the battery life and slowing down.
however based on number 3, sounds like he didn't want a Samsung phone in the first place. If you aren't using ANY of the Samsung apps, what's the point really. Some are bloat, sure.. but c'mon. Samsung web browser is great, email client is fine, Samsung calendar is the best in the business imo, Samsung app store can have good stuff like themes, definitely love the Samsung gallery app, memo app is solid, and Always on Display is great