I don't feel bad for him because of that. He knew when he was paying the sanctioning body fees that he was doing it to buy his way to a title shot, as there's no way he's earned it - I don't see why boxers you use the sanctioning fees system can ever be surprised when the whole process doesn't go smoothly.
That's a slightly different debate though. NBA, NFL, SPL, FIFA, etc all take sanctioning or licence fees. It's the price of doing business, but imagine that Wolverhampton managed to get to the Cup Final against Manchester United. But then the Premier League decided it would make more money from a match with Manchester City, and fucked Wolverhampton off. There would be outrage, even if all the other teams had been fielding their B-teams and given WH a bye.
Same principle. Whether the fighters Ajose fought were poor quality, they were the ones the WBC told him he should face to get a title shot. He's not been "buying" his way to a shot, he's been paying the fees the org demanded to be ranked by it. To overlook him again is frankly criminal. BUT I do agree with your other point: why did Ajose think he was special or different?
It's like a girl going out with a serial cheater - "He's different with me".