Why was the man in Isaiah 53 despised and rejected, why did they hide their faces from Him?

“He is despised and rejected of men; a man of sorrows, and acquainted with grief: and we hid as it were our faces from him; he was despised, and we esteemed him not. Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted.” - Isaiah 53:3-4.