Anyone with a retirement account can pick a different fund. They can be even buy individual stocks to collect their own portfolio. Or even buy anti-Facebook security.

But there's no demand for that as far as I see. So I guess shareholders are actually happy, and unhappy are the people here on HN who are not shareholders.

There is a rather large number of investors that are not happy, and aren't quiet about it. That's why Facebook faces investor lawsuits every so often.

Investors sue because they can, not because they are unhappy.