I got an NDA from XXXXX (insert engineering firm name there) that basically is unenforceable unless they want to sue me for more than the $4,400 they paid me of

I got an NDA from XXXXX (insert engineering firm name there) that basically is unenforceable unless they want to sue me for more than the $4,400 they paid me off when firing me. Quite a tough lesson to learn that Arkansas hillbillies make shitty leaders.