What does Psalm 22:1-18 mean?

My God, my God, why have you forsaken me? Why are you so far from saving me, from the words of my groaning? O my God, I cry by day, but you do not answer, and by night, but I find no rest. Yet you are holy, enthroned on the praises of Israel. In you our fathers trusted; they trusted, and you delivered them. To you they cried and were rescued; in you they trusted and were not put to shame. But I am a worm and not a man, scorned by mankind and despised by the people. All who see me mock me; they make mouths at me; they wag their heads; “He trusts in the LORD; let him deliver him; let him rescue him, for he delights in him!” Yet you are he who took me from the womb; you made me trust you at my mother’s breasts. On you was I cast from my birth, and from my mother’s womb you have been my God. Be not far from me, for trouble is near, and there is none to help. Many bulls encompass me; strong bulls of Bashan surround me; they open wide their mouths at me, like a ravening and roaring lion. I am poured out like water, and all my bones are out of joint; my heart is like wax; it is melted within my breast; my strength is dried up like a potsherd, and my tongue sticks to my jaws; you lay me in the dust of death. For dogs encompass me; a company of evildoers encircles me; they have pierced my hands and feet— I can count all my bones— they stare and gloat over me; they divide my garments among them, and for my clothing they cast lots.

English Standard Version (ESV)