No Paul did not get it wrong, but people’s understanding of what Paul wrote is wrong.
(2 Peter 3:15-16) “Think of our Lord’s patience as your opportunity to be saved: our brother Paul, who is so dear to us, told you this when he wrote to you with the wisdom that is his special gift. He always writes like this when he deals with this sort of subject, and this makes some points in his letter hard to understand; these are the points that uneducated and unbalanced people distort, in the same way as they distort the rest of scripture a fatal thing for them to do.”
Jesus told us what one has to do to enter the kingdom of heaven.
(Matthew 7:21-23) “It is not those who say to me, ‘Lord, Lord’, who will enter the kingdom of Heaven but the person who does the will of My Father in Heaven. When the day comes many will say to me, ‘Lord, Lord, did we not prophesy in your name, cast out demons in your name, work many miracles in your name?’ Then I shall tell them to their faces: I have never known you; away from me, you evil men!”
And
Rom. 3:28-30, "For we maintain that a man is justified by faith apart from works of the Law. 29Or is God the God of Jews only? Is He not the God of Gentiles also? Yes, of Gentiles also, 30since indeed God who will justify the circumcised by faith and the uncircumcised through faith is one."
Rom. 4:5, "But to the one who does not work, but believes in Him who justifies the ungodly, his faith is reckoned as righteousness,"
Rom. 5:1, "therefore having been justified by faith, we have peace with God through our Lord Jesus Christ;"
Rom. 9:30, "What shall we say then? That Gentiles, who did not pursue righteousness, attained righteousness, even the righteousness which is by faith;"
Rom. 10:4, "For Christ is the end of the law for righteousness to everyone who believes."
Rom. 11:6, "But if it is by grace, it is no longer on the basis of works, otherwise grace is no longer grace."
Gal. 2:16, "nevertheless knowing that a man is not justified by the works of the Law but through faith in Christ Jesus, even we have believed in Christ Jesus, that we may be justified by faith in Christ, and not by the works of the Law; since by the works of the Law shall no flesh be justified."
Gal. 2:21, I do not nullify the grace of God; for if righteousness comes through the Law, then Christ died needlessly.
Gal. 3:5-6, "Does He then, who provides you with the Spirit and works miracles among you, do it by the works of the Law, or by hearing with faith? 6Even so Abraham believed God, and it was reckoned to him as righteousness."
Gal. 3:24, "Therefore the Law has become our tutor to lead us to Christ, that we may be justified by faith."
Eph. 2:8-9, "For by grace you have been saved through faith; and that not of yourselves, it is the gift of God. 9Not by works, lest any man should boast."
Phil. 3:9, "and may be found in Him, not having a righteousness of my own derived from the Law, but that which is through faith in Christ, the righteousness which comes from God on the basis of faith."
What you're preaching is "works alone" which heretical. Salvation comes from faith and works. Not just works.
I consider myself a better Christian now as a non-Christian. The label "Christians" has the baggage of ancient and outdated fundamentalism and completely misses the point, in my opinion.