"I hate myself"
There are a lot of songs with lyrics like that, and a lot of people say that themselves.
On the other hand,
"I hate my kids"
I've never seen a song with those lyrics, and I don't know of anyone who professes to do so (regardless of how they feel about it)
Why? I don't have to ask myself. Because the subject and the object are different.
Even though they are your children, they are not your children.
-----
In comparison, the world is full of "I hate xx".
Additionally, "I hate my parents", even if they are related by blood, can be found everywhere (though not in the lyrics).
In other words, there is an asymmetrical relationship between parents and children about "dislike".
The children are in a stronger position.
-----
Children can give reasonable explanations about "dislike",
"Children are not born to choose their parents"
or
"Children are forced to be vulnerable as dependents in the first place"
or
"Children are destined to inherit their parents' genes"
On the other hand, it's difficult (or "impossible") for parents to provide such a reasonable explanation.
"Thank me for being born and for being here"
An adult who can say those things to a child must have a pretty good heart.
-----
Now, back to the "I hate myself" story.
(To be continued)