Ephesians 1:5,6 - Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will, to the praise of the glory of his grace, wherein he hath made us accepted in the beloved.
We were chosen in Christ long before the earth was made. A low opinion of yourself or self-hatred is not from God, but from the enemy.
Prayer is not trying to get God to do something for you by making Him feel sorry for you. It is coming to Him knowing that you not only deserve what you ask because of the righteousness of Christ, but you also have a right to it because it is based on His Word.
Hebrews 4:16 - Let us then approach the throne of grace with confidence, so that we may receive mercy and find grace to help us in our time of need