I'm just going by common sense that anyone not in the Biden cult could follow.
Burisma is a corrupt company who paid the son of the sitting vice president hundreds of thousands of dollars for apparently nothing. Since he had no qualifications to sit on the board of a Ukranian energy company, other than what his daddy could do for the company as VPUS, I connect the dots that this is what they paid him for.
You are welcome to belief the theory that he was most qualified for the job, regardless of family connection.