I did not say we shouldn't follow God's law and commandments, I said we are not capable of it.
In Deuteronomy 30:11-20, it presents obedience to God's law as a choice and as a possibility, not as something that we are not capable of doing, and in Romans 10:5-10, it references that passage as the word of faith that we proclaim.
Galatians 3 10 For all who rely on works of the law are under a curse; for it is written, “Cursed be everyone who does not abide by all things written in the Book of the Law, and do them.” 11 Now it is evident that no one is justified before God by the law, for “The righteous shall live by faith.
In Acts 5:32, the Spirit has been given to those who obey God, so obedience to God is part of the way to receive the Spirit, however, in Galatians 3:1-2, it denies that "works of the law" are part of the way to receive the Spirit, therefore that phrase does not refer to obedience to God. In Romans 3:27-31, Paul contrasted a law of works with a law of faith, so works of the law are of works while he said that our faith upholds God's law, so it is of faith, and a law that our faith upholds can't be referring to the same thing as the works of the law that are not of faith in Galatians 3:10-11.
According to Deuteronomy 27-28, relying on the Book of the Law is the way to be blessed while not relying on it is the way to be cursed, so Galatians 3:10 should not be interpreted as Paul quoting from that passage in order to support a point that is arguing against it by saying that relying on it is the way to be cursed. Rather, the way to be cursed is by not relying on the Book of the Law, which is why all those who instead rely on works of the law come under the curse for not relying on the Book of the Law.
Furthermore, in Galatians 3:10-12, Paul connected a quote from Habakkuk 2:4 saying that the righteous shall live by faith with a quote from Leviticus 18:5 saying that the one who obeys God's law will live by it, so the righteous who are living by faith are the same as those who are living in obedience to God's law. In addition, in Isaiah 51:7, the righteous are those on whose heart is God's law, so the righteous living by faith does not refer to a manner of living that is not in obedience to it. God is trustworthy, therefore His law is also trustworthy (Psalms 19:7), so the way to trust God is by obediently trusting in what He has instructed while to say that God's law is not of faith is to deny the faithfulness of God.
Since none of us keeps the law perfectly, we are all under a curse. Jesus Christ took this curse on Him so in Him we might be justified. God no longer sees a Christian as a sinner, but He sees His Son who never sinned.
Deuteronomy 30:11-14 says that God's law is not too difficult to obey, but if we needed to have perfect obedience in order to avoid being cursed, then it would be too difficult for us to obey. In Deuteronomy 11:26-32, the difference between being under God's blessing or a curse is based on whether we choose to follow God or to chase after other gods, not based on whether we have perfect obedience. While everyone in the OT sinned, everyone being under God's curse does not reflect the reality of what is recorded about those who served God, just those who chased after other gods. In Deuteronomy 28, it describes the blessing of relying on God's law and the curse of not relying on it, so being set free from the curse of God's law is being set free from not relying on it so that we can be free to enjoy the blessing of relying on it. God is a loving Father who knows how to give gifts to His children for our own good (Deuteronomy 6:24, 10:12-13), so he did not give His law in order to curse His children and thinking that is something that He would do is expressing an extremely negative view of Him.
Rom 5:20 'The law was added (given) so that the trespass might increase. But where sin increased, grace increased all the more, so that, just as sin reigned in death, so also grace might reign through righteousness to bring eternal life through Jesus Christ our Lord.
In Romans 7:22-23, Paul delighted in obeying the Law of God, but contrasted it with the law of sin that held him captive. If Romans 5:20 were referring to the Law of God, then that would mean that Paul delighted in causing sin to increase, which is absurd, but rather it is the law of sin that causes sin to increase.
Gal 3:23-25 'Before this faith came, we were held prisoners by the law, locked up until faith should be revealed. So the law was put in charge to lead us to Christ that we might be justified by faith. Now that faith has come, we are no longer under the supervision of the law.
So the law exposes our sin. We see ourselves as we truly are. And having seen the problem, we will then look for the solution - which is that through the death of the Lord Jesus, we may be declared righteous in God's sight through faith in what Jesus has done on our behalf.
There is a reason the Bible says 'there is none who does good, not even one. All came short of God's glory.
Does that then mean because we are saved, we no longer have to keep God's commandments? Don't even think about it. Who loves Lord Jesus, keeps His commandments, but we do not keep His commandments to be saved, because God already provided the payment for the sins of every born again believer.
In Matthew 7:23, Jesus said that he would tell those who are workers of lawlessness to depart from him because he never knew them, so knowing Jesus is the goal of the law, which is eternal life (John 17:3). So the law leads us to Jesus because it teaches us how to know him.
In Titus 2:14, Jesus gave himself to redeem us from all lawlessness and to purify for himself a people of his own possession who are zealous for doing good works, so becoming zealous for doing good works in obedience to God's law is the way to believe in what he accomplished through the cross (Acts 21:20).
There are many people who are described as being righteous in the Bible, such as Noah (Genesis 6:8-9) and Zechariah and Elizabeth (Luke 1:5-6), so Paul was not denying in Romans 3:10 that anyone is righteous, but rather he was quoting from Psalms 14:1-3, which says that no one is righteous among those who say that there is not God.
I agree that we are not required to obey God's law first in order to become saved as the result as if it could be earned as a wage, however, I still see living in obedience to God's law as being an intrinsic part of the gift of being saved from not living in obedience to it.