For better or worse, Russian signal jamming is the best there is.
And yet, we have seen in Ukraine that Russia continues to be struck by radio controlled systems whilst in both Israel, Iran and Venezeula we have seen that American / Israeli / NATO electronic warfare systems were able to totally disable Russian air defense, command and communication systems. Maduro had the very latest kit, delivered by plane mere months before the attack and yet ended up completely defenseless.
Whilst Russian jamming does have some advantages in power, your statement is simply wrong. Several serious problems have been identified
* Russian jamming tends to fail to actively track signals allowing enemies with more flexible transmission to avoid it
* Russian jamming lacks effective deconfliction; not only does this mean it disturbs their own signals, it also means they have to switch it off at times and so lose protection
* Russian jamming tends to rely on singular large powerful transmitters for wide areas and so is unable to adapt to local situations and frequency requirements.
Incidentally, the India / Pakistan air fight provided some suggestion that Chinese systems may be superior to Russian ones as well.