I would like to lookup some old code which is in a Bitbucket private repo, however it seems I can't login to Bitbucket unless I let Atlassian force me to create a Atlassian Cloud account.
Since they switched auth completely to Atlassian Cloud accounts I don't think so. What's so bad about migrating your account to an Atlassian Cloud one, to me it didn't seem to make much of a difference?
Mainly an ethical issue, I'm sure it is in their ToS somewhere they don't need to provide access but at least they could have sent a notification beforehand. Now I can't even delete my account. I don't agree it is simplified at all.
Sorry for the hassle. Though it's not your issue, we needed to clean up all the different identity systems we had created over the years (Bitbucket, HipChat, Atlassian cloud, Atlassian services). Nothing nefarious, and we have literally spent years planning to make it as seamless for customers as possible.
If you have any issues - contact support@atlassian.com.