2) AWS did not take advantage of you and making a mistake does not absolve you of responsibility. There's nothing to dispute.
3) Bankruptcy is allowed, and is also exactly what happened. You stated other things like filing fake disputes and transferring funds to a new company, which is fraud. And that does come with criminal charges.
EDIT: to your completely revised comment - Bills are still owed, even if it's only civil, and judgements can result in wages, taxes and other assets being garnished. Saying you were "tricked or confused" when you weren't is fraudulent, and credit card companies are not going to defend you from that. Unless AWS forced those charges or failed to deliver services, there's no dispute.