Mine is working ok - I called Apple Support yesterday when I couldn't get the hand washing timer to work - they fixed it in just a few minutes. Would call them if you have the time.
Carrot hasn't had any of the problems with watch complications that the stock weather app has.
On the other hand, you have to update to premium ($20/year, IIRC) to be able to use the carrot watch app.
Being referred to as a meatbag by the carrot app *is* free!
10.0 did the same thing to mine, but I searched MR Watch forum for sunrise and found a fix that worked for me. That fix is now the second option on Apple’s support article below: