Game of Thrones final season [spoilers]

[Amarok]

Well, she must have been watching Rhaegal for a long time, because those huge black sails would have been visible from miles away. And what fleet drops anchor without scouting the area first and checking if they aren't about to be attacked?

1.Accept once again they were behind an island and thus out of view 

2. why would they have scouted ahead as there was reason to believe they had a fleet there and second I point out they have a dragon so what fleet could possibly be a threat .

3. And even if she saw the fleet it wouldn't matter because again she has a dragon and there was no way they could have known they had equipped their ships with scorpions .

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And I'm supposed to believe, that what pushes her over the edge is the death of just some girl, with whom she occasionally talked about their boyfriends' c*cks?

Who was one of her most trusted confidence and one of her loyal servants and your missing the point that this was the last straw .