My God what delusion. The flanker series will fight against Raptor and the typhoon when they can't even win against Rafale.
The Russians got caught with their pants down 'cause of their slow modernisation. While it's pretty impressive what they managed to get in just a few years, but, yeah, the Flanker series cannot defeat Western air forces. Their investment into underwater forces has paid dividends, but their land and air forces are yet to be modernised.
Otoh, they spent a lot of money on their air force. If anything, while they may struggle to defeat Western fighter jets with their current tech, at least their air defences have reached a point where they can shoot down whatever fighters jets can drop on them.
Within 10 years, they will get to the point where they will be able to take on all of NATO in Europe on their own. They are busy breaking the balance of forces while Europe still sleeps. Only Poland has acted decisively.