Paul Pester is an absolute bloody cretin, and unfit to run any company larger than a cornershop.
Running a cornershop is actually pretty demanding - there's no fall back, no administrative or professional support, long hours, customers whining that they can get Product X for 40% less in Asda. Anything and everything is down to the owner to organise and make happen, likewise any problems, nobody else to solve them. All commercial risks are with the owner, and they take the flak from customers when other people let them down.
I can't think of a less suitable person to run a corner shop than a former McKinsey consultant and banker. And I really can't see how his doctorate in mathematical physics qualifies him either for banking or running a corner shop.
And anyway...what have you got against cornershop customers that you'd want Pester to be in charge of one?