Eh, I think outside of potential language/accessibility/hardware incompatibility issues that I've read on blogs/comments, Linux works for the "average" user. It's the slightly "advanced" user like me who struggles, and the "truly advanced" who swim like a duck in water in any distro. Like the bell curve meme.

I say this cause if I literally only needed some apps and the browser, I wouldn't struggle. But I do tinker with things and end up needing slightly uncommon software/features that require me to use the CLI (and my dumbass can't remember commands), even though I'm mid at using the CLI. Meanwhile, people born with a usb-stick in hand love the CLI and use it for everything, even things I would try to avoid unless I felt it was easier.

A kid I know has put his grandparents on Fedora, and has no issues. It comes down to the person. If they can click some buttons and read, and only wanna use office, browser, and a app or two, they'd probably live. Yeah, you might have to tinker how it looks for them or put the apps on the desktop, but outside of that, it's simple.

Windows definitely doesn't "just work", I had to figure out Windows decided to kill my Wifi adapter whenever my laptop would go in sleep (god... why???). OneDrive is an ass, devices not wanting to connect (Bluetooth controllers), printers, etc. I'll give you that Mac works pretty well for those who like it, but I hate Apple and never got used to Mac. I still can't remove some shitty old virus scanner that doesn't work anyway and it can't update anymore, so it just rots on our computer. So like, Mac has their off-days with me too (one time FF nuked itself...)