You have done your very best and yet your very best has not found acceptance with the people. You may be just like Moses. The children of Israel were unreasonable. Having grown tired of manna every day, they blamed Moses for not giving them meat to eat. Moses was angry. “I have had it with these rebels,” he complained. “I have done my very best, and this is the thanks I get.” (my words)
Maybe Moses was feeling sorry for himself?
Maybe he did not think God was being fair.
He felt sure he deserved better than he was getting.
10 Now Moses heard the people weeping throughout their families, each man at the doorway of his tent; and the anger of the Lord was kindled greatly, and Moses was displeased.
11 So Moses said to the Lord, “Why have You been so hard on Your servant? And why have I not found favor in Your sight, that You have laid the burden of all this people on me?
12 “Was it I who conceived all this people? Was it I who brought them forth, that You should say to me, ‘Carry them in your bosom as a nurse carries a nursing infant, to the land which You swore to their fathers’?
13 “Where am I to get meat to give to all this people? For they weep before me, saying, ‘Give us meat that we may eat!’
14 “I alone am not able to carry all this people, because it is too burdensome for me.
15 “So if You are going to deal thus with me, please kill me at once, if I have found favor in Your sight, and do not let me see my wretchedness.”
The feeling that we deserve better than we are getting always seems to be the basis of self-pity.