I was on the Ultra for 18 months or so and came away from it feeling like a much less powerful and capable Garmin is much nicer as a daily watch. I found myself wanting to find reasons/excuses to justify the Ultra. Ultimately I couldn't, and it wasn't worth its cost, charging schedule, and lack of battery life.
I can see why others like them (they want WatchOS and Apple-specific capabilities). That stuff is useful, but not often enough for me to care.
Really, the watch was a regular reminder of how functional life was before the watch existed, if that makes sense. It's a genuine marvel, and yet... I got by (and get by) great without it.
I think a large percentage of your problem might be that you bought the most expensive model. Was the Ultra really the one to get?
It’s the thickest and heaviest, for one thing.
There’s a decent argument for the SE as the best Apple Watch for most people because it’s cheap and it does most of the things that regular people want out of a smartwatch.
As I recall, I went with it because it supported the best dive features. I used it for that quite a bit for a while, but eventually realized my basic cheap dive watch worked fine, could take a beating, and was actually better rated for deeper dives. Having physical buttons is a huge advantage over the Ultra. The dial was never enough to get the control I wanted, even if the UI only required it.