'Complaint' in the Bible

When I say, 'My bed will comfort me, and my couch will ease my complaint,'

Though {I say}, 'I will forget my complaint; I will change my expression, and I will rejoice,'

"My inner self loathes my life; {I want to give vent to my complaint}; I want to speak out of [the] bitterness of my inner self.

[As for] me, [is] my complaint for human beings? And if [so], why cannot I be impatient?

"Even today my complaint [is] bitter; my hand is heavy in addition to my groaning.

"If I have rejected my male or female slave's case when their complaint [was] against me,