[Margaery was trained from birth by her grandmother, but Tommen's spinelessness and Cersei's. . .everything weren't taken into account]

Thank you. I did what I could to influence Tommen into making wiser decisions, but he was too meek to see them through.

[Westeros was falling apart at the seams and it seems to Margaery that only Daenerys taking the Iron Throne for herself would begin to set things right]

He was. He created a monster out of a dying man to serve as Cersei's protector. He never removed his helm, but I could still see the blue skin and blood red eyes.