Make sure it's not in "Do not disturb" mode. After an hour of restarting and factory resets, I found that to be the problem!
Thank you thank you thank you! I thought my watch had a gyro hardware issue until the gesture worked while doing activities, so I thought it was a software bug! But I would never think it was (no idea how) set to do not disturb and that is why it has been dark for weeks now!!
Thank you, mine also had DND on!