The main cloud services don’t even work natively (GoogleDrive, OneDrive, iCloud) basically the only mainstream choice is Dropbox. I tried to use Google Drive in Mint, and it’s a pain to get it to work, and usually it stops working after computer restarts.
Someone has a recommendation about how to handle these services?
I have a self-hosted Nextcloud and my Nextcloud account connected via GNOME as an Online Account. It integrates seamlessly with Calendar, gives me a webdav mount for my files etc. I don’t have any issues. I have not added any Google accounts, and definitely no Microsoft accounts. I don’t use public clouds for private stuff.
The self-hosted bit is the problem. I have yet to find a Nextcloud provider that offers the service truly ready to go. The ones I found try to make it somewhat easy by offering Install buttons in web interfaces but if you have absolutely no clue about such things, even that is a hurdle to overcome.
Here is the official list of nextcloud providers that do the setup and maintenance for you: https://github.com/nextcloud/providers#providers
Considering that the list includes providers I’ve had first hand experience with and those are not ready to use: No.