I’ve been wanting off both dropbox and Google drive for a while now. I’ve no tried https://app.filen.io/ , https://jottacloud.com/en/ and https://proton.me/drive/ and i’ve setlled on the first one. why?
works across all platforms and in muktiple ways including webdav, sync and my favourite as a network drive (https://docs.filen.io/docs/desktop/network-drive)
and 20GB for free if you sign up via https://filen.io/r/c38f0bdb37c8f976ef46b25068122fa6
I’m not paying, as mentioned I have 20GB free which is more than enough. syncthing at least is Swedish and works well enough (just not on my phone). Resilio is US based as are some of the others you listed