Force Restart your watch:
Press and hold BOTH the digital crown and power buttons at the SAME TIME. Keep holding BOTH until the Apple Logo appears (can take several seconds), then let go.
I can understand your frustration, but calling it a POS is a bit unnecessary. Most people have no such issue with their Apple Watch Ultra. I most assuredly don't.
Are you using the charger with came with your watch?
And as with any piece of electronics, a minor percentage can fail. If the Forced Restart doesn't get you back up and running, you have a full one year warranty, so take it to your closest Apple Store for evaluation and options.