The 3.3 is a good motor. Unfortunately-you have had some bad luck and it's not anecdotal of the 3.3 in general. There are added costs of companies that do business in Canada. Some things you get heavy subsidized has to be paid for somehow. And yes-my 2017 Santa Fe has a 10year/100,000 mile warranty. It should be noted that Hyundai replaced the 2.4 motor in my Son's Sonata and it was well out of warranty and even provided him with a rental at no costs to him for a week while the motor was on order.
This experience was so positive for him-he just recently bought an off-lease Santa Fe. It seems Canadians have a tendency to pay more-but can't just make the connection as to why things are the way they are in your country-when it's quite obvious.