> He drove a very hard bargain and often shouted and swore at suppliers to extract the best prices. Bullying or business?
I worked for a guy who had built a business from his kitchen table to 90,000 sq ft building employing 100 people.
He was on vacation and met up with a long-time supplier of a material he used in his products, and after dinner one night the supplier told him he'd be increasing his prices by some large amount. They had a huge argument, and as soon as he came home he started a new plan. He'd make the material himself.
He found a person with a Phd in that field, bought the necessary equipment, and started producing his own polyurethane foams. After another 10 years, he found his own customers and was making more money reselling the foam than he was using it in his own products, and ended up selling the company to a chemical conglomerate for tens of millions of dollars.
Another fun fact: this guy would do all of his drawings in Microsoft Paint. Architectural drawings, product designs, everything. Blew my mind. He would fly tutors in for the week as he tried to learn AutoCAD, Solidworks, etc, but he hated them all.