Well it's the whole Deibu thing that started it, yet people seem to forget that a Deibu is technically the highest level of shitheadness, something that other types of yukkuris reach as well.
Maybe in a future, we'll get another wave change and people will be more fair and threat both Marisas and Reimus based on their level of shitheadness, than in their type nature. After all, they are the archetypical pairing, both in bad and good, hell, calling them literal partners in crime in the majority of the cases would be a understatement.
i bet you anything that after this conversation reimu atempted to attack and kill marisa only to get her ass kick because she's not as strong as marisa do to takeing it easy all the time