Stannis Baratheon quickly went from a respected, if not loved character to one of the most hated in the course of a single episode. Just a couple of scenes, in fact.
While fans had grown accustomed to his dealings with Melisandre and the Lord of Light, it had been hoped there was a limit on how far he would go. Namely, that the limit would be Shireen. Not even filicide was too far for Stannis, as he sacrificed his only child to R’hllor in the hopes of it helping him win the war with the Boltons. Suffice to say it didn’t work out too well.