Nobody who hates on the Scions actually hates them. They are just starved for a Character Death, especially with a Main Cast Member.
.....and Yshtola's many Fakeouts.

Calling Graha or even Alisaie creepy makes no sense, I wonder if people are just not used to, or never have been cared about by a friend or others.

Estinien is hated for the same Reason Kratos is on the New God of War games.....he has a personality now that hes grown older and wiser, and he is no longer Edgy.
Which I think is a good thing, because Rawr Edgy boy gets old very quick.
Him staying an edgy guy wouldnt have kept him interesting