In Titus 2:14, it does not say that Jesus gave himself to free us from the Law of Moses but in order to free us from all lawlessness and to purify for himself a people of his own possession who are zealous for doing good works, so the way to believe in the freedom that we have in Christ is by becoming zealous for doing good works in obedience to the Law of Moses (Acts 21:20) while the way to reject what he accomplished would be by returning to the lawlessness that he gave himself to redeem us from. In other words, the freedom that we have in Christ is the freedom from sin, not the freedom to sin. In Psalm 119:142, the Law of Moses is truth, and in John 8:31-36, it is the transgression of the Law of Moses that puts us into bondage while the truth sets us free.
According to Galatians 5:14, anyone who has loved their neighbor has fulfilled the enter law, so it refers to something that countless people have done and should continue to do in perpetuity, not to something unique that only Jesus did.
Changing the medium upon which the Law of Moses is written from stone to our hearts does not change the content of what it instructs us how to do. For example, the command to keep the Sabbath holy written on stone has the same content as the command to keep the Sabbath holy written on our hearts.
We can't earn our own righteousness even as the result of having perfect obedience to the Law of Moses (Romans 4:1-5), so that has always been a fundamental misunderstanding of the goal of why we should obey it. In Psalm 119:29-30, he wanted to put false ways far from him, for God to be gracious to him by teaching him to obey the Law of Moses, and he chose the way of faith by setting it before him, so this has always been the one and only way of salvation by grace through faith, which is why those who are under grace are not permitted to transgress the Law of Moses (Romans 6:15). Likewise, the Spirit has the role of leading us to obey the Law of Moses (Ezekiel 36:26-27) and the Law of Moses is the Law of Liberty (Psalm 119:45). To interpret Galatians 3:10-14 as speaking against relying on God's instructions is to interpret it as speaking against relying on God.