A lot of normally fine people because assholes when driving. When you're stuck in a mess of traffic, with drivers going 30kph under the limit and people going 50kph over the limit, with construction, accidents, weather, ill conceived on ramps and highways designed for traffic numbers from 30 years ago, it'll always be hell. Toronto is not unique to any of this sort of hellish traffic. In fact, I'd say the Bay Area is generally a worse rush hour commute, and extends over a much greater area.
I do love driving cross country, on open roads though. I no longer own a car (thankfully, it's a sink hole for cash), but it is fun to rent a car during the summer for a road trip.