This hurts me so much because-- Meg is free. She took in her foster siblings. Nero can't harm her or her family anymore. She's free. She killed the Beast --- she got rid of Nero
She's showing her siblings that the world can be kind, and that they have the chance to be too. She's showing them love, just like how it was shown to her
And Apollo went back.
When he gets his goodhood back, he's in Olympus. Olymps, where his father, his abuser, rules. Olympus, where his family is. That place isn't his home. He didn't have a home to go back to. And even if he loves his siblings (or, uh, some of them), they still took part in Zeus' abuse; they ignored it, acted upon it, took their anger out on others, and unlike Apollo, they refuse to change
But he knows better now. He knows not to seek his father's aproval, knows that what they did and are still doing is wrong and that he doesn't deserve to suffer because of it
He's not like them, not anymore. Maybe he never was (everything about him was a lie, after all), but now? Now that he knows the truth, now that he sees so clearly how fucked up it all is, how can he bear to go back? He'll stay as far away from Olympus and Zeus as possible. He'll be kind in his father's place, but he's still under his rule
Apollo knows, now, that even if they're all powerful beings --- even if they're gods --- they're still people. And this is something his family is too afraid (an ungodly emotion) to accept
Zeus puts his hand on his shoulder and says You have made me proud. Apollo doesn't cry nor scream-- he doesn't hug his dad, knowing that this might be the last time he gets the chance to
A unfair king, a tyrant, knowing that he may have gone too far this time, attempts to put his child at ease, making him believe that everything is fine now. But it isn't. And the child doesn't believe him
Apollo knows now. And he'll try to change things for the better