Nope, because this is the "results override intentions" kind of karma. There are two rival visions about how karma works: one that takes a person's original intention into account (forgiving them if they accidentally cause someone else misfortune by sheer accident) and another one where it doesn't matter if it wasn't their intention to cause a wrong, they're still gonna get it if the end result is that they somehow were the cause of it in the end. This second type of karma is the one more deserving of the phrase "karma is a bitch"... since in this second type, as well, "attempted" wrongdoings are considered as less serious than "successful" wrongdoings, because this type of karma only deals with end results, not with original intentions.
Thus, this story's evidently using the second type, where the consorts are less guilty than the mc because they didn't actually succeed in their attempts to harm him, whereas the mc did in fact end up being the cause of their misfortune. Besides, to a view of karma that only cares about maintaining the pre-existing social order, the emperor's wives would be justified in their wrongdoings against him, since they were there before him and he's the one who, one way or another, caused their deaths by arriving and upsetting the pre-existing social order. Thus, this view of karma that deals only with results will punish both the one whose actions upset the social order (the emperor) and the one who unwillingly caused it and who accidentally "benefited" (somehow) from it.
This dog blood drama. I swear to god.
I dont know why him feel bad though, the three consorts tried to kill him.
.
.
(I'm not talking about the whole dying in front of him bit, that would fuck up an ordinary person)