At this point, iPhones & Samsungs are both fairly easy to use & insanely expensive if you ask me :D
But they work and thats why they are selling the most :D
I switched from One Plus to Google Pixel last time I bought a phone.
Google Pixel is like $550 usd, so way cheaper than One Plus, Samsung or iPhone and it works just like a phone, nothing fancy :D
I always tell my parents to either buy a cheap Samsung or switch to iPhone, when they are looking for a new phone, just so its easier for them to use it :D