You do not even know that Paul was quoting the Old Testament about a CERTAIN TIME.
Paul is quoting Psalm14:1-3; 53:1-3; and Ecclesiastes 7:20. Ecclesiastes SAYS there is not a RIGHTEOUS man who does what is right and NEVER SINS. Ecclesiastes tells us that there ARE RIGHTEOUS men but none who NEVER sin. Paul is explaining that the Jews were sinners just like the Gentiles. Nowhere in these passages or scriptures anywhere does it say none can believe on their own. In this same Ecclesiastes 7, Solomon tells us about wise men, righteous men, and about a man who pleases God. Solomon also tells us that he found one upright man among a thousand. The Bible tells us that there are people who want to do right.
Paul is quoting King David. Paul is explaining that the Jews were sinful too. What is King David saying where Paul quotes? Listen carefully; at that time in which David speaks, the people are in a bad condition inside Israel. When the day spoken of arrived, no one searched for God.
If no one ever searched for God, ever, then how was it that the Israelites called out to God to help them when they thought God had forgotten them while they were slaves in Egypt?
Exodus 3:9 And now the cry of the Israelites has reached me, and I have seen the way the Egyptians are oppressing them.
Deuteronomy 26:7
Then we cried out to the LORD, the God of our ancestors, and the LORD heard our voice and saw our misery, toil and oppression.
If no one ever searched for God, then why do the scriptures say people did?
In the New Testament, when Jesus arrived, people shouted: “Son of David, have mercy on me”. They were looking for the Messiah. In the New Testament a blind man was searching for the Son of God, the prophet’s had said would come. I just showed you that people do search for God. Again, Paul was explaining that the Jews were sinners like the Gentiles, even though the Jews were supposed to be God’s Holy people.
I have completely covered every false thing you were thinking about what Paul said. Why won't you now repent for preaching falseness?
Obeying Jesus is entering through the gate.