I've tried Jellyfin and the Live TV / tuner interface sucked so bad I didn't want to bother with it any further. Maybe I could have found plugins or some shit to make it more usable but I've had a lifetime Plex pass for almost a decade and it still works great
Yes, they've made a number of decisions that truly suck in that time but it's still better than the experience I had with Jellyfin or Emby, even recently.
The guide (or lack thereof) and UX was severely lacking.
Have you used a tuner on Plex?