The Chosen One Was Me, Not You

[I am thinking of a foundation centered on pure love.]
There was a prophecy about the end of the world. And there was also a prophecy about the birth of someone who would stop it.
However, the children born were twins. One was considered the chosen one, and the other was ignored to such an extent that they would not even give him food.
[Family Regrets] [Protagonist who will not forgive his family] [Protagonist with a new family]