He seems to have a thing for hating the mother/Reimu. In most stories, the Reimu is often the ill-tempered, bad-mannered.
Then again, almost everything Takumi ends with the yukkuri dying, whether squashed, starved, melted, or whatever. They die pissing and pooping on themselves.
The EndMommy and Reimyu's bellies were empty this whole time
So hungry that it feels like dyingBut Reimyu is still a little one so she can't go huntingWhen Reimyu finished eating mommy, she will have no food leftDaddy... Why doesn't daddy come home?Daddy...
Please come home...But mommy did "eat up easy" for Reimyu's sake and saved ReimyuAlthough daddy said he's gonna let Reimyu take it easy, Reimyu hasn't felt easy for such a long timeA long time has passed since Daddy has not come home