Are we talking about Confluence from Atlassian’s login? What’s so bad about it? It’s usually tied to your SSO provider, so you just have to sign in to your work account. In the server days, it was connected to your AD/LDAP password.
I don’t like Atlassian products very much for a lot of reasons (each iteration of the UI gets worse), but the login process has never been an issue for me, so I’m surprised to see your comment.
Not OP, but have to use the cloud version of Jira and Confluence. My biggest complaint is that they put the "Yes! Send me news and offers from Atlassian about products, events, and more." checkbox in the place where I would expect the "Remember me" checkbox.
I don’t like Atlassian products very much for a lot of reasons (each iteration of the UI gets worse), but the login process has never been an issue for me, so I’m surprised to see your comment.