Dude is literally a mass murderer and horrifically killed parents of, not 1, but 2 of your friends/teammates as they fucking watched.
But because he's an edgy anime pretty boi, that makes him a "complicated, flawed character who just needs wuve uwu".
He basically made Haru's father's brain explode on live television, crying blood in agony, as his daughter was watching. (Granted, dude was kind of a dick, but he didn't deserve what he got and Haru most certainly did not deserve to witness it.)
And even more unforgivable imo: Not only did he make Futaba's mom commit suicide in front of her by jumping in front of a car, he took the extra step of making her say that she never loved Futaba and that this was her fault for no other reason than to traumatize her further. Which it did, and almost psychologically destroyed her for life, as it would for probably anybody.
If there was any justice, his canon death would've just been Futaba and Haru curb-stomping him to death.
And I really fuckin' hate how Royal's ending gives some sort of implication that someway, somehow he's still alive: Fuck. That.
At least in Vanilla he was still dead as shit at the end.
Tl;dr, My final opinion on Akechi: :rip-bozo:
And not just killing people's parents! If you fuck up in dialogue, he straight up murders the MC! And even if you prevent that, he still murders a mental copy of the MC thinking it's the real one! And the Thieves know he'll do that and plan around it!