The author's iPhone 6+ does not age well with apps consuming significant power. That anecdote is not useful, because that is a particular issue with the author's phone and not general enough to be useful. If you abuse your phone battery, it will not maintain capacity. My 6 plus's battery is at 89% capacity after 3+ years.

The author complains about Apple technical support, but brings up a anecdote about a laptop (I thought this was about a phone). Can you bring a Samsung phone to a Samsung store to get it repaired? I remember needing to mail my Samsung phone in for warranty repair and the screen coming back with a diagonal slice where they cut the packaging open. That sucked, but I am not going to blame all of Samsung for that (it was probably an unfortunate mistake) or blame the Android ecosystem.