DECO!!

Especially in Splatoon 2, you can feel that he genuinely did care for the inklings at least a small amount. How far that went is debatable, but either way, I think he respects them as a society, even if he struggles to consider it home. If you read some of his lines before his fight, he says things like "a prosperous future for all", and that this is his "responsibility as CEO", all things that, to me, indicate that somewhere along the line, he started factoring in the happiness of the inklings into his plan as well, even if he was not at all actually taking into consideration what they wanted.

I like to interperate the Grizzco dialog less in the "Mr.Grizz recorded voice lines for everything and tried to pass it off as live feed" way, and much more in the "He did actively talk to the inklings and watch over their missions" direction, since I think its a little silly to point to repetition in video game dialog and say that it indicates it being pre-recorded. Especially because the Mr.Grizz statue has a radio in it, not a voice recorder, specifically having the ability to receive signals. Although this one is very debatable.

It also feels like people are too quick to write off his personality and behavior in Salmon Run as a front or just him trying to come off a certain way for the sake of keeping suspicion away. While it definetely wasn't reflecting his full personality, I think that the way he behaved in Salmon Run was still a real part of his personality, maybe one he was only comfortable fully expressing within emotional and physical distance.

Of course with how little we really know about his general life by the end of the game and even how he was operating anything, the room for interpretation is super wide and any Grizz takes are cool in their own way, but I do like to see more of his original Grizzco personality shine through instead of it being overlooked due to the revelations at the end of Splatoon 3.