Now, this isn't me trying to change anyone's mind about their favorite writing application. I'm just giving my personal experience and findings. There are changes in settings you can make to potentially prevent companies from sharing unpublished work.
For the longest time, I would say I loved using Google Docs for writing drafts for novels/comics, but with the implementation of AI to read your emails, messages, documents and images, I've decided to migrate elsewhere. It took me months, so the transition wasn't easy.
Anyway, currently I'm using Libre Office for writing my stories, it's the closest to Google Docs in my opinion without the AI hassle. As for the other stuff, there's a different application I found to replace their other services. I won't go into details since it would be too technical and may change the topic at hand. xD