Ah, I see. So mindcontrol.
That makes sense at least.
And yes, most mc's are morons.
But most mc's are morons the same way 98% of humanity are morons.
The brain of moronic in this game is worse than the average.
(Also, a TRULY well-made yandere does not give off enough hints that he is yandere until it's way to late.
It's rare to see a writer with skills enough to give off just enough hint that the reader suspect it, without making it obvious enough that the mc should have thought anything of it.
But I think maybe Sebastian from Particles of Reality have that. And to some degree Sol from The Kid at the Back. (violent tendencies aside.)
Still...
