Air Canada fucked me harder than any airline ever did, delaying a flight for 6 hours then landing in a different city and adding a 3 hour turnaround because the flight crew didn't have enough hours to complete the remaining leg. And when we finally got to the original transfer, it was midnight so the airport closed and shifted the next leg to the following day and refused to pay for a hotel for the night. A 17 hour flight turned into 40 and added several hundred dollars they refused to give back. Shady as fuck and by far the worst flight I've ever experienced, and one of my bags didn't show up until 3 days later.