E2EE is irrelevant if you encrypt your files before uploading them. This can either be done with a tool like Veracrypt or Cryptomator but a simple locked .7z file is also easy to use. I just store a locked folder in my Filen account and update it every month or so to keep everything up to date.

I liked it until my docker desktop randomly stopped working. Made me uninstall docker and now I use podman instead. But yeah, pretty much the same.