hate great sage

i dislike great sage, he intervene with natural selection,weaponize human and then left because he is dissapointed with human.
it's like you pick up a dog, and then abandon it.
if he want humanity to develop he shouldn't stay with human for 300 years,he should teach them basic and see how they develop themselves.
it's like seven said, it doesn't matter if if it human,elves or even monster as long as they develop magic.
in the first place why it's great sage?with his power it's not even surprising to be called 'god'