Nope, even developing countries have large transit systems.
Just going through Wikipedia, Istanbul, Kiev, Bucharest, Tehran, Santiago, Kuala Lampur, Sao Palao, Rio De Janeiro, Buenos Aires currently have a bigger metro system than us and are expanding at a much faster rate than we are.
There are a few more in China, SouthEast Asia, and Lagos that are building an entire system of comparable or bigger size to what we have currently from scratch, to be opened in a few years.
I think the biggest shock by far is Los Angeles, a city that is by all means entirely car-dominated, that is building lines non-stop. And its residents are even supportive and happy to pay taxes for it!
When you consider that GO Transit is also a thing, and that our streetcar network is much better than most bus lines in the developing cities you listed, Toronto has a decent transit network.
If you actually experienced living in the outskirts of one of the cities you listed, you would see the experience is not much better (or worse) than taking transit here in Toronto from the likes of Scarborough or Mississauga.