I've never liked Kodi's performance and stability, don't like the UI (skins don't help, it works the same regardless and most of the unofficial skins are half-broken anyway) and I hate how it's configured—those last two are intertwined, because I don't like how config is scattered all over and mixed in with using the thing, on a TV interface (another matter on a web or desktop interface—that would be fine). Haven't gotten used to or comfortable with it in years and years of using it.

Finally switched to Jellyfin with its accompanying Roku app (and the web interface, in a pinch). Much happier with that. Jellyfin in docker on my fileserver, map the drives there, start it up with auto-restart (which will also start it on boot) and forget about it. Configure and watch some on the web, but mostly just watch from the couch on a Roku. Much better UI, despite being far from perfect. Snappier and less fragile, even in its web interface. Media source management's less crazy-making.

I don't really use live TV, streaming (the plugins I usually wanted to use on Kodi were usually broken or too janky to use, anyway), or radio, on Kodi, though. Or the games features—I use Lakka instead, which I like much better UI-wise. I don't think Jellyfin can replace those features, if you use them.