Cherry picking out of anecdotal evidence? I have read countless stories of Apple users who have had their beloved software broken by Apple updates. It goes both ways.
In that sense, Apple fundamentally fails the "makes lives easier" bot again due to the extent to which they hold back the easiest-making platform (mobile web). From years old indexeddb bugs to penalizing the performance of websites saved to the home screen to slow-rolling other PWA features, Apple's success is a matter of history, marketing, and proprietary integration, not ease of use.
I wouldn't be surprised to find that if the app store hits some critical mass in terms of offerings that they decide to just get rid of a all mobile browsers. Christ I hope that doesn't happen...
On the other hand, the last time I held an iPad it was because someone asked me to help them remove some apps from their tablet. I couldn't figure out how to remote anything because the little X that's supposed to appear when you want to uninstall something didn't show up. I was probably tapping it wrong (3d touch?) but I ended up giving it back and telling them to ask someone used to Apple devices.
There's a lot that iOS does right but there's also a lot that it does wrong. The same goes for macOS in my opinion.
The benefit macOS has is the same benefit ChromeOS has, in that it tries to show an interface with as few buttons and widgets as possible. There's a bunch of apps at the dock in the bottom and most people will probably never need more than that, aside from a decent browser maybe.
Windows tries to do the same but because it is Windows and people are used to button placements that have been the same since Windows XP, attempts at minimalism in the interface often meets friction. The Windows 7 control panel was, honestly, complex and difficult for many, but after so many years everyone who used it needed time to adjust to the new flatter, simpler design.
Microsoft tried to go the "make it as simple as possible" route with Windows 8, where they used the same paradigms on desktop as people were already using on mobile. This failed miserably and now they're doing a weird mix of keeping the old and reintroducing the interface for common programs every big update. It's a mess but I don't know what I'd do differently.
The sad reality is that now that Microsoft has lost the mobile OS wars, they'll never have the shared ecosystem they so direly need to properly compete with Apple. Their Xbox integration might prove to be a game changer here, though, because an Xbox and a few Windows PCs have the potential to compete with Apple TV and a few Macbooks.
A chromebook would have suited her just as well if only it had enough hard drive space to store her pictures and was easier to connect to her iphone- one of those are not Apple's fault, one is.
OTOH, my mom figured out how to use an iPad and MacBook after struggling for years with windows PCs, so they are doing something right (or resting on the laurels of previously decent decisions).