Cannot believe no-one has said Toronto. It’s a terrible airport.
1990 - arrived, no bags for 2 hours, surly staff. On the way home the check in staff insisted we were going to Leeds-Birmingham airport, not LBA, which was interesting, and then we were held in a holding pen for 3 hours after the gate was called.
2022 - arrived and held on plane for almost an hour before allowed to disembark, then funnelled through a ludicrously packed room while they hoiked people out for random Covid testing.
A week later departing for Calgary (which is an absolute delight) the security queue was disorganised and 2 hours long.
And transiting on the way home was unreal. Many, many, gate changes and delays for all Air Canada departures, insane queuing areas at the gates where passengers for one gate crossed with those for another, no information from staff. And the worst and most expensive bar food and bar service I have ever encountered anywhere ever.
Never again. I understand locals use Buffalo and cross the border at Niagara if they possibly can.
On the other hand, I have no complaints about Orlando International (T3 is great). Manchester has also been surprisingly pleasant (T2). Even last year during the worst of the delays the queuing seemed calm and the staff friendly. I guess my expectations may be low…