If i had to guess, it being able to run on all the random shit it does is because its open source.

Where do the users in ur house struggle? My family loves it. I was able to remedy all of their complaints with shitty band-aid fixes, but they work and they like and use it.

It's interesting you say that because jellyfin tracks my familys watch times better than netflix. I will agree the apps are bad. I normally use a browser view on my xbox instead of the app lol. The only issue ive experienced is on one of my old smart tvs fast forwarding and pausing doesn't work, but i chalk that up to it being a 9 year old smart tv.