The Canadian armed forces participate in international missions in cooperation with other forces, and in domestic matters. You don't really need fighter aircraft for domestic missions; and for international missions you need whatever will work in coalitions. With a stable US pushing the F-35, the F-35 is a reasonable candidate for coalition work. Without a stable US, the F-35 is a poor candidate; presuming Canada would continue to be allied with NATO ex-US, whatever that group decides is the future is going to be a better choice.
If Canada can't defend against the US, then they should just accept they'll be swallowed by it or start making babies and populating the prairies. In the meantime, if Canada wants to contribute to defense of its allies, it should focus on creating a credible air counter to the Arctic.
Canada does coalition missions because Canada relies on allies for defense. We traipsed along on British misadventures for a century or so because we relied on them for defense and wanted to keep the British happy, and then we traipsed along on American misadventures for the last century because we relied on them for defense and wanted to keep them happy.
It's not the F-35's fault it's not suitable for Canada. It was never intended for tundra. It's Canada's fault that for the last 20 years there's been no juicy tender for a long range fighter to entice the europeans or the yanks to come up with a suitable modification of one of their twin fighter jets.
But every military is aware that the plan to go full fox-3 (+ stealth) might die in the next decade, and we might be back to FOX-2 / dogfighting. Is it likely? Not really, but drone and AI change the battlefield to much to be sure of anything.
Furthermore, as much as I love a slick single-engine fighter, the F-35 is still fundamentally designed to operate in contested airspace. Canada, if they operated the jet for the next 50 years, would likely never have to use it for it's intended joint strike purpose. Unless you habitually molest the borders of other nations, the F-35 is not a purchase that makes a whole lot of sense to taxpayers. If the F-35 was truly "comically overpowered" then Congress wouldn't be asking to restart the F-22 production line, now would they?
Is that a demonstrated capability, or a claimed one? Because if there's one thing the war in Ukraine has shown, it's that Russia seriously overpromised on the performance of its high-tech hardware.
Even giving the Russians every capability that they claim to have, it is questionable if they can even keep producing much of the high end of their technology with the sanctions leveled against them. Without Western components they are unable to manufacture a decent range of their good stuff.
The Su-35 has one of the highest fuel fractions of any military aircraft at about 38% of max take-off weight. That's 9% higher than an F-22 and equates to 11,500kg of fuel.
Just conceptualise 11.5 tonnes of fuel - basically an American yellow school bus being hauled into the air by a fighter than can do Mach 2 and pull 9g.
To be fair though the F-35A has a remarkably high fuel capacity too, about 8,000kg. All that chunkiness has an advantage.
Jet fuel is about 7 pounds a gallon. So we’re talking about something like 4000 gallons. A bus is something 40 feet by 10 feet by 10 feet, which is like 20000 gallons. So it’s about a fifth of a school bus.
Still a lot, though!
The problem isn’t a lack of F-35 capabilities, the problem is that Canada doesn’t know what it wants. AFAIK Canada only has two fighter bases, and given the fact that the country is arguably the largest in the world, this means Canada is not serious about intercepting adversary aircraft. Canada also hasn’t had over 100 fighters in a long time, so it doesn’t have a significant deployable force. So what does Canada want?