'Bitterness of My Soul' in the Bible

“Therefore I will not restrain my mouth;I will speak in the anguish of my spirit,I will complain in the bitterness of my soul [O Lord].

“I am disgusted with my life and loathe it!I will give free expression to my complaint;I will speak in the bitterness of my soul.

“What shall I say?For He has spoken to me, and He Himself has done it;I will wander aimlessly all my years because of the bitterness of my soul.