There is no complaining at great white throne

God saves a sinner by sending (through His grace) the Lord Jesus to be the Savior of sinners. If in the future there will be people who go into the lake of fire, there will only be groanings of pain but no murmurings and complaints (that you see now by various posters here), because the lake of fire is God’s most just punishment. In the judgment of the great white throne told of in Revelation 20, no one will rise up and complain that God is not just even though they do now. But their time is short. In the backdrop of 13.7 billion years, the are alive for a few decades and are know-it-alls.