Someone on another board said British Columbia under the NDP is much more lenient than Ontario under the Conservatives.
Not initially: they NDP government in BC acted shifted and more strictly than the Ontario government initially which helped to flatten the curve and allow for lighter restrictions now while Ontario needs to have more restrictions because they failed to do that. Its a bit like arguing that the New Zealand government is one of the "more lenient" governments in the world regarding COVID restrictions based on how things are there at the moment which would be ludicrous to argue: their swiftness in locking things down in response to any cases is what allows them to have significantly loosened their restrictions now.
Plus as that graph shows the number of cases in the US is rising again significantly and unlike much of the world the US never really dramatically lowered their case numbers: there's a reason why the US seems to be on a third wave while everyone else is on a second: and with governors in some of the worst hit states decided to eliminate their remaining restrictions that's only going to get worse. "Flattening the curve" isn't a one-time act: its something that has to be regularly chased until the pandemic is permanently under control.
In relation to Sweden as well: the rhetoric there is changing and while the government hasn't officially announced a change in course: they seem to be on the road of introducing much tighter restrictions and the general consensus is that their approach hasn't worked; especially in comparison to their neighbours (two of the three being Social Democratic-led governments as in Sweden) who followed more aggressive policies.
