A simple scrip to disable MacOS HUD's
chmod +x watch_osdui.sh
nano ~/Library/LaunchAgents/com.example.watchosdui.plist
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>Label</key>
<string>com.example.watchosdui</string>
<key>Program</key>
<string>/path/to/your/script/watch_osdui.sh</string>
<key>RunAtLoad</key>
<true/>
<key>KeepAlive</key>
<true/>
</dict>
</plist>
launchctl load ~/Library/LaunchAgents/com.example.watchosdui.plist
If you have problems similar to the HUD remaining static or you simply want to restart the service, just run this in the terminal
launchctl unload ~/Library/LaunchAgents/com.example.watchosdui.plist
And
killall -CONT OSDUIHelper