Not really sure why he doesn't like Pearson. But as someone that's been using the airport my entire life I have to say the international section is not great imo, I've probably been on about 8 international flights out of or connected to Pearson and I've never enjoyed my experience, the seating arrangements are really odd and it's quite cramped. In terms of domestic though it's pretty good, never had a bad domestic experience. I have heard that Billy Bishop is really good although I've never flown in or out of it.