Got too much Cersei in him.Bro really tried to Game of Thrones his way into getting the crown.
Not really related but this actually happened in our country's history. Emperor Lê Long Đĩnh got the throne exactly by having "assassings" barge in killing his brother Lê Trung Tông. Trung Tông only ruled for 3 days after a bloody war of succession. Long Đĩnh, in turn, died suddenly at 24 after 4 years and Lê Dynasty was replaced by Lý Dynasty.Well, well, well, looks like somebody forgot the right to rule comes from the consent of the governed. You can't just cackle maniacally in front of your older brother's fresh corpse with such a large audience and expect everybody to support you