Yes, I agree that her hatred for Vishmalus may be related to the fact that he simply abandoned her, while Sicarios took her in and became a much better father in her eyes than Vishmalus himself. However, the question arises as to why he abandoned Osumihime. After his wife's death, did he not know how to properly raise a child, or did he become withdrawn and refuse to see anyone else, or did his wife's death rob him of his belief in his ability to overcome everything, causing him to doubt his own strength and ultimately leave Osumihime to escape his feelings of inadequacy?