Apple Watch Series 1 issues after updating

I have an Apple Watch Series 1. After recent updates I’ve been noticing the following problems:

- Battery doesn’t last 11-12 hours even after full charge. I turned off many apps on the watch and almost all notifications. Still doesn’t last.

- Workout app freezes or doesnt work. If I choose elliptical and get on the machine, it no longer records the workout. I have to restart the workout a few times and it works I’m lucky.

- When I click on workout app, it’s frozen and I can’t scroll to choose some other workout. I can’t select the last workout either. I have to try and kill the app somehow to get it to work somehow.

Why is the Apple Watch suddenly so buggy? 😠