Slightly disagree - while LibreOffice might be better in features, the UI/UX of Google Docs worked so much better for me, it's not even funny.
The UI in LibreOffice feels quite clunky and outdated and never seems to have been given any thought since the OpenOffice days. But Google Docs is so feature poor that I'd rather live with LibreOffice's UI. Especially as you can adjust to the latter after using the software for a while.