Without a doubt. Her older relatives are in control.
However a muppet she is not:-
From Mr. & Mrs. Google
"Paetongtarn Shinawatra holds a Bachelor of Arts degree in political science from Chulalongkorn University and a Master of Science degree in international hotel management from the University of Surrey."
She, and others, is proof, in my opinion, that extremely rich people should be barred from holding political office.
Success in business does not equate with success in organising a country for the benefit of the people who pay them.