A claim does not make something true. lol.
Iran could have asked a desperate Russia for 1-2 S-400 batteries over the last 2.5 years but they did not.
They know exactly how their Bavar-373 stacks up against S-300 PMU2, which incidently is pretty close to S-400 as it was manufactured after Russia stopped making S-300s and so needed to use many S-400 components, and felt what they had was either on par or close enough to S-400.
Nothing bad with Iranian air defense, it is objectively good, and regarding how Iran alone started from zero to elite club, it's great...among 5 6 countries that have sustainable air defense...bavar is elite and only marketing, promotion and enforcement is advantage of concurrents...
But air defense can't improve fast enough to match crazy rate of innovation of any kind air flyers, you can troll most potent defense with with weapons cheaper than cheap new car...in cyber sector, from friends and enemies iran next to big trio, but opponent is literally first in the rating...
Probably is true that Israeli manage to spy on Iran...Iran is closer, so can do that directly...i think that nothing is totally safe anymore, spying is in golden era, new approach is definitely necessary... Hezbollah survived next to mossad because of maestral ability to troll the enemy...
I can't find better translation, creative interpretation of events and activities, they can speak about football games and actually they share and prepare sensitive stuff....but impossible for outsider to understand...
this is simplification, of course, but is developing through centuries in shia communities, for self protection from obvious reasons, and that keeps dynamics of shia system's, unlike curious case of Arab suni majority that is in same state of hibernation 1000 years circa...from superpower to actual situation where Israel is their supreme leader, and they always have big leader, happy with freedom in local administration...
This was more than just answering post, because many westerners can't figure out why is for Iran so important to ensure aura of most powerful shia nation...
Israel can't defeat Iran, they will try some desperate moves that require smart decisions to counter, they can be hard, but worst days are finished, this is just to keep result and finish the match...
Like Hezbollah, if they survive they are winners...