But the broader point about lawsuits not being free is valid. Because in addition to filing fees, you need to pay lawyers to do this. And I am not a lawyer, but I don't know many good lawyers would would take on a case to go after a bankrupt company that has no assets. And even then, those good lawyers are going to want a retainer and multi-hundred dollar an hour fees to do the work, so sure. File a lawsuit. Spend tens of thousands of dollars to get a judgment that the defendant can't pay. What good does that do?
Like, to be clear, if you have more money than God and want to spend time making a point, I'm all for it. You do you. But most people don't have that much money or time to piss away when there is nothing to be gained from the exercise.