No, it wasn't. It was very simple. You want an account for youtube, sign up on youtube, you want an account for something else - sign up there. You want your accounts to be the same login across all the services? Use the same login across all the services.
It wasn't confusing, it wasn't complex, it didn't present any problems to anyone of even moderate intelligence.
> Is it really beyond the pale for a service to prompt you to enter some optional information about yourself?
It's not really optional when they start tying everything together. I don't want my real name tied to any of my online activities - but if my google accounts were stuck together through google+ it would be, because I use my real name on my phone.
It's possible to lie of course, and tell a different lie with a different email address for every time you want to limit the degree to which different portions of your data contaminate other things. But it's a pain in the arse and only realistically possible because they're not enforcing their single sign on policy that strongly yet.
They're made it far more complicated to keep your privacy than it was before.