Angels know God better than Christians but through the latter angels know God's manifold wisdom

This comes out in Ephesians 3:10, 11. See also 1 Peter 1:12.

Ephesians 3:10, 11

His intent was that now, through the church, the manifold wisdom of God should be made known to the rulers and authorities in the heavenly realms, 11 according to his eternal purpose that he accomplished in Christ Jesus our Lord.

Angels are better than humans but converted humans are better than angels

This comes out firstly in Psalm 8:5 and Hebrews 2:7 and then Hebrewss 1:14, 1 Corinthians 6:3, etc. Angels are created superiror to humans but in the new heavens and earth believing humans will reign over angels.

Psalm 8:5 You have made them a little lower than the angels and crowned them with glory and honour.

Hebrews 1:14 Are not all angels ministering spirits sent to serve those who will inherit salvation?