EULAs are not law. They are an agreement between two private parties. You are going to have to post up the aspects of its EULA that you think Facebook violated. Class action suits are likely, though I don't think Facebook did anything illegal and lawsuits are not proof that they did. If you made the mistake of installing the Facebook app, you approved permissions to allow it access to phone contacts and other data.
In capitalism: Let the "buyer" beware. Use your heads, people.
breech of contract is a legal matter. Fraud is another.
If you want to differentiate between criminal law and contract law, fine, but that's not the same as 'FB broke no laws.'
Whether or not the Feds will do anything would depend on if Trump believes FB wronged him in any way. If it were an AWS matter, he'd have already raided their building.
Investors, otoh, aren't happy, and not just FB ones. Their actions dragged down the entire tech sector this month. Lots of short term losses.