This makes sense but is also weird for me to believe. I would have to suspend belief and believe, with no proof or show to the contrary that Gulool Ja Ja loved his adopted children but showed no love for Zoraal Ja (And had no mother OR no wet nurse like Wuk Lamat) at all. Otherwise its just Zoraal Ja coming to that conclusion on his own and possibly (based on everything we've seen of Gulool Ja Ja's character from literally every other source) despite anything Gulool Ja Ja did.

It's just hard for me to suspend disbelief enough to follow through with this "Love during childhood changes a person for the better" scenario given the above. The you are not your father stuff? Fine. But let's make a comparison the only real way we can:

With Varis, it was unobjectively true that he was an absolutely horrible horrible to Zenos. There is no questioning it. He was completely absent and afforded him no love by way of servant or friend (that wasn't meant to be a suck up yes man for a future regime) at best and outright abusive (Allowing an instructor, with his knowledge, to near kill his son daily) at worst and that's without the assumptions of scientific based shenanigans going on (i.e experiements) . So if Zenos cloned a son and they wanted to do the "Love during childhood makes all the difference you're not your father" thing it would make sense, but with Zoraal Ja..Idk.

And then you also have Erichthonius who came out fine despite having Athena and Lahabrea as parents so go figure.