You reduce the passage to being about "a guy who was incredibly ugly" whereas the context (see Isaiah 52) indicates someone beaten horrifically, "his appearance was so disfigured beyond that of any human being and his form marred beyond human likeness".

Your caricature neglects to mention and skirts around the key details of the passage:

The suffering servant is the kingly representative of his people, appointed by God, who, though innocent, will bear the punishment of his people's sins on their behalf. He will be smitten by God and they will mock him for it. He will be rejected, suffer and die, but he will rise, and make many to be accounted righteous.

The substitutionary atonement is clearly repeated many times in Isaiah 53:

"Surely he took up our pain and bore our suffering, yet we considered him punished by God, stricken by him, and afflicted."

"But he was pierced for our transgressions, he was crushed for our iniquities; the punishment that brought us peace was on him, and by his wounds we are healed."

"We all, like sheep, have gone astray, each of us has turned to our own way; and the Lord has laid on him the iniquity of us all."

"For he was cut off from the land of the living; for the transgression of my people he was punished."

"He was assigned a grave with the wicked, and with the rich in his death, though he had done no violence, nor was any deceit in his mouth."

"Yet it was the Lord’s will to crush him and cause him to suffer, and though the Lord makes his life an offering for sin, he will see his offspring and prolong his days, and the will of the Lord will prosper in his hand."

"After he has suffered, he will see the light of life and be satisfied; by his knowledge my righteous servant will justify many, and he will bear their iniquities."

"For he bore the sin of many, and made intercession for the transgressors."