>>130155722Trauma from dealing with multidimensional bullshit.
It's only thanks to his age and his mental resilience that he hasn't devolved into a orgy having sociopath, which he did as soon as everything "bad" about him was shucked away in that slime bath episode.
Evil Morty shows that he's like one bad day away from being a bigger threat than Rick could ever be, fucking his sister by comparison is almost plebian.