Agreed with the above. Also, it’s not a good idea to try to interpret every single line in the Psalms as an explicit teaching. The Psalms are songs, not a catechism, and many times they just express one way of feeling about a subject. So we don’t read Ps. 55 to say that there are evildoers who cannot change their ways, and let’s wish them dead and sent to Hell. We don’t read Psalm 109 and pray to God that our enemies’ children will wind up as miserable and unloved vagrant beggars.
And remember that – although a thousand years in God’s eyes are merely a yesterday, Ps. 90:4 – the Psalms were in fact written a thousand years before God sent Christ to be a new covenant for mankind. For what it’s worth, too, if you feel overcome with your burden of wicked deeds, read Psalm 65. If you feel caught by the snares of Sheol, read Psalm 116. And so on.