"perhaps you can quote which book on investing endorses that method as a strategy."

Perhaps you can quote the book that says to hold a stock in which you have no faith in management and no prospects in changing management. You've supposedly been trying to change things with this company for around 10 years now, or whenever your attempt at seating yourself on the BOD was. And you've failed miserably. And supposedly still hold the stock. I want to know what investing book is guiding you.