He sees with dread and pain what he may become when old.

This hatred of himself in his father is, Balaustion thinks, the source of his extreme violence with his father.
She, with the Greek sense of what was due to nature, seeks to excuse this unfitting scene.

Euripides has gone too far for her.

She thinks that, if Sophocles had to do with the matter, he would have made the Chorus explain the man.
But the unnatural strife would not have been explained by Sophocles as Balaustion explains it.

That fine ethical twist of hers--"that Admetos hates himself in his father," is too modern for a Greek.