How would margaery fare being with a good but strong willed king?

How do you think she would've done with a good king? Like if Robert had a legit and handsome son same age as margaery thats like baelor Breakspear, reforms the crown, institutions, has a good kingsgaurd, wins battles against the golden company and a strong king.

He treats her very well, respects her no matter what and clearly loves her alot but he almost never listen to her advices or suggestions regarding ruling and things like that.

Would she mind or become fustrated with that? Would she try to undermine him, manipulate more viciously or work around him? Have olenna arrange an accident for him?