Let's say you sign such an exit clause and get paid your 2 weeks hush money. What's to stop the company blaming some performance or missed target on a project

Let's say you sign such an exit clause and get paid your 2 weeks hush money. What's to stop the company blaming some performance or missed target on a project on you afterwards, possibly even publicly. And then you're not allowed to respond. I have never signed a clause like this in a start/end employment contract nor will I ever. If a company doesn't want to be spoken ill of, don't do ill. If the only way a company can keep its employees/former employees from speaking true ills of them is to contractually obligate them not to, that's not a company worth giving the time of day to.