Can't sue the government for discretionary spending. The government has broad immunity when it comes to tort liability. You would lose. Probably can't sue Straight due to statute of limitation issues unless you recently realized some harm that you can attribute to your time at Straight. (Have to prove that you reasonably couldn't have known of the cause of the damage until recently). This is a hard argument to make if you have been complaining about Straight for years.
What would your cause of action be? Negligent infliction of emotional distress, intentional infliction of emotional distress, negligence? Battery? Assault? Do you have identifiable damages? I'm pissed and depressed doesn't count. For example, you have the burden of proving outrageous conduct that caused severe emotional distress (should have physical symptoms). Some of the experiences I have read about on this site SURELY qualify, but you have waited too long. I don't even know who you would sue. I believe Straight is no more. Correct? Are there staff members still around?
I would advise you to get a client from one of the more recent programs (Pathway?) and get them to file a complaint.