St. Paul is providing an example of weak will in Romans 7. But, he continues, that with divine grace he can "with the mind serve the law of God". His will, while weak, can become strong as Christ sanctifies him.
It is little wonder that Christians don’t recognize the theological underpinnings of the RCC as legitimate. You manufacture answers without any consideration for truth.
Paul states in no uncertain terms that his will is in bondage to sin. That means, the choosing mechanism that you claimed was free to select any moral choice it wanted, was in Paul’s case, not free to choose goodness. He admitted it, but you will not. That makes you wrong...there is no “free will”.