Contradiction with Proverbs 29:11
This verse suggests restraining one's feelings, whereas Psalms 142:2 is about openly pouring out one's complaints.
Proverbs 29:11: A fool uttereth all his mind: but a wise [man] keepeth it in till afterwards.
Contradiction with Matthew 6:7
This verse advises against vain repetitions in prayer, while Psalms 142:2 supports expressing all concerns to the Lord.
Matthew 6:7: But when ye pray, use not vain repetitions, as the heathen [do]: for they think that they shall be heard for their much speaking.
Contradiction with Philippians 4:6
Advises against being anxious about anything and instead present requests with thanksgiving, potentially conflicting with the lamenting tone in Psalms 142:2.
Philippians 4:6: Be careful for nothing; but in every thing by prayer and supplication with thanksgiving let your requests be made known unto God.