WatchOS 10 is unusable for me. I sent mine back to revert to OS 9.

The vast majority of my interactions with Apple Watch is swiping to change faces to quickly observe a bunch of data in a glance or to launch apps. With this user interface entirely deleted, it feels to me that they've handicapped the OS to a mere shadow of what is has been since this feature was introduced in WatchOS 3.

They should instead add a lock button for the people who are so greatly burdened to have to flick their finger to change from a face they accidentally flipped to.

"Smart Stack" is dumb AF. It looks nice and it's probably usable if you're sitting still crouched over your watch but to try to use it while you've active is a nightmare. It's too small, doesn't show enough information, it's fluid, lacks permanence, isn't possible to always be in the order of intention... it's just a UX bag of turds.

Not a fan of moving Control Center but not the end of the world. It and the previous crown and action button presses were all much more ergonomic as they were.

The Weather app doesn't make much sense. I imagine I'd get used to it but it's certainly a downgrade, as is the rest of the OS, in usability.

It's pretty though. I absolutely admire it for its prettiness. But I've lost count of the ways it's taken a step back in usability. It's a smart watch. Its primary reason for existing is to present data as clearly and efficiently as possible.

People may have their preferences and subjective feelings about things but WatchOS 10 is objectively more cumbersome to use than WatchOS 9.