I'm not so sure that cycling in Toronto has become more dangerous. At worse the driving is the same. Ever since our joke-Mayor left, we have been installing more cycling infrastructure that keep cyclists separated from drivers. And in the odd occasion where driver and cyclist interact at these places, I've seen drivers give way.
And then there's technology. When cycling on roads and streets without bike lanes, rear-facing cameras keep most drivers at bay.
I've never had a face-to-face confrontation with a bad driver. The worse, just as before, is a bit of honking and attempted bullying but nobody has tried any intentional harm.