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Sorry, I misread. What is bad about the UX exactly? You don’t need to customize anything if you don’t want to; “it just works”. And I dont follow you on how having the option to customize things makes it a bad user experience. You’re assuming the native UI is bad for some reason.
I’ve used Plex a lot too back in the day but there’s nothing it provides that Jellyfin doesn’t do out of the box + self-hosted + for free.
Through the release of the first iPhone to the mid 2010s I’d wager that most consumers agreed that iPhones were superior to Android by most metrics: they featured more support across the board, had more apps, looked nicer, and were considered the premium. Apple pioneered the modern smartphone and had a headstart in getting users hooked into their ecosystem. Nowhere was this more pronounced than in the wealthiest country in the world (and Apple’s home country).
That’s a huge generalization but I think it resonates true to a degree. Also, anecdotally, I remember that all my school computers were Macs when growing up. I’m sure Apple seeped its tendrils into people’s lives a variety of ways. It’s not a cake walk for most people to switch ecosystems. As a lifelong Windows user I’ll have a panic attack if you asked me to print a document on a Mac; I’m sure its the same vice versa lol