Whoa up there. You started reading that book in the middle.
Paul is quoting from the Psalms. He isn't pulling those verses out of context to make them say something not originally intended...the way you do. There is a whole bunch of stuff Paul tells us before he drops this bomb. You're supposed to read it all.
Before Paul put forth the quote from Psalm 14, he said this...."What if some did not believe....."
Romans 3:3 For what if some did not believe? shall their unbelief make the faith of God without effect?
Quoting from the Psalm.... This is talking about the fool who says there is no God...they are corrupt. Then
(UH OH), what do I see? I see that God is in the generation of the RIGHTEOUS. You are claiming there are no righteous? You claim that because you don't read the Psalm Paul quotes.
Psalm 14:1-5
The fool hath said in his heart, There is no God. They are corrupt, they have done abominable works, there is none that doeth good. The Lord looked down from heaven upon the children of men, to see if there were any that did understand, and seek God. They are all gone aside, they are all together become filthy: there is none that doeth good, no, not one. Have all the workers of iniquity no knowledge? who eat up my people as they eat bread, and call not upon the Lord. There were they in great fear: for God is in the generation of the righteous.
Now go back even further to Romans 1. All men were created to know God, it's those that are unthankful, BECOME VAIN in their imaginations....only then do their foolish hearts become darkened....they become fools. And that is why you see there is a generation of RIGHTEOUS right along side those fools. Therefore, man cannot be born with the excuse of original sin or being too depraved to seek God.
Romans 1:19-22 Because that which may be known of God is manifest in them; for God hath shewed it unto them. For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse: Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened. Professing themselves to be wise, they became fools,
It isn't until our heart is darkened that we are under the dominion of sin. It isn't until we are old enough to choose the evil over the good that sin slays us. Romans 7:11