I am going to make a point.
The USA. Builds the finest combat aircraft in the world. Period.
However, they are so technically complex and difficult to manufacture. That while magnificant weapons of war, are costly to maintain and even more costly to produce enmasse.
The Russians, build above average fighters. That are easy to repair, are easy to fly, and you can build thousands upon thousands of the things.
Numbers, above average equipment and logistical replacement. If the USSR\RFED were to be geared for full scale war on par with the USA, the USA would not be able to match it unless it focused on more conventional fighter types such as 16's and 18s. F-22s and F-35s will be far too expensive to maintain and deploy to fight a long term conflict. MiG-29's in exceedingly large numbers would overwhelm US fighter defence eventually.
Eagl flew F-15s. He knows what the firepower of the US military is capable of. But it doesn't count for damn unless you can replenish it, supply it and maintain it. And that is where the Russians and Chinese have the advantage.