From your example, we do not have any 3rd party services integrated and it does not even fit into our idea, but instead have single sign-on for all apps bound to your own Cloudron user management. In fact your own Cloudron is for example an LDAP and OAuth provider on its own for the installed apps.
Regarding your high friction to get going, we only now started to support self-hosting outside of our managed version, so there are still rough edges as well, but that is what we are focusing on next. This is also one of the reasons, we only currently support AWS (even though other providers are in the works), the setup to get to your Cloudron should be easy, afterall that is one of the main goals to make self-hosting easy. If you have more feedback in that area, that would be great.