yeah , Russia doesn't accept to sell Su-30 ( 4 gen fighter ) to Iran and tortured Iran for S-300 , but they are helping Iran to make strategic missiles which can target it soil ... some times you just need see simple fact in simple way to make right judgment ...
You want to say Iran and NK are nothing with Russia and china , so you making story ... you guys are fooling yourselves ...
Who has told you that Russia won't sell SU-30? Babak from twitter? We don't know the terms of the deal. But at the very least Iran wants production license in Iran. Maybe Russia is not willing to offer that.
Second of all does Iran even have the money for a major arms deal? Look around everything it is buying is being financed or having to loan from another institution. Furthermore, how serious is Iran even about upgrading its air force? Up till early 2000's Iran could have bought A LOT of things from Russia including a brand new airforce. Never materialized.
And the S-300 Deal is from precisely the time period when Russia was appeasing the West like I mentioned prior. Times have changed. Even Iran generals said Russia offered S-400 but they rejected it.
And no one says that Russia is building missiles for Iran, my point was that Russia could have supplied blueprints or technicians to North Korea to help it close bottlenecks in development and subsequently North Korea shared information via Iran on new design.
And again no one said that North Korea and Iran are nothing without China/Russia. You are just ignorant and fail to accept that both countries got help on their missile programs.
Some of your points are valid but some of it is just convincing yourself and some other parts are just to make your story right... Russia is simply a neighbor to Iran and because they are neighbors and because they both have strategic interests in opposing West and US in particular they seem to have common direction in few fields. Overall, Russia sees Iran as a potential rival, this is why she is so cautious with strategic and semi-strategic know how transfers. They can easily help Turkey with S-400, Egypt and others with latest weaponry systems but never Iran as they see these nations not capable of becoming a threat to Russia militarily. Russia only sells weapons to two categories. Either are no potential to become big threat (Turkey, Egypt) or already are very strong and beyond limit (china)... When some talk about the possibility of Iran receiving strategic help from China and Russia, they just make their desired stories... Iran asked Russia for old 4 gen fighters... they won't sell it... S-400... won't sell it... Russia has a history of back stabbing with Iran... We bought 3 Kilo class subs and Iran was afraid to let them get to Russia for overhaul... u can guess why!
What Iran has is its own local scientists and tech plus some black market components that eventually are used to short cut the mastering process.
Iran is all alone... All Iranian allies an friends are smaller than Iran... Iran has no big brother...
Again no solid proof that Russia won't sell Iran 4th gen fighters especially considering most of the region is loaded up on 4th gen fighters and Israel will have 5th gen soon. 4th gen fighters are probably not "game changers" especially if limited numbers.
Iran is not serious about funding its airforce and the amount of planes required to overhaul its airforce in a significant way raises questions about if they even have the money to fund such an acquisition.
Furthermore, Russia came in to syria for a variety of reasons including self interest. But if Russia did not come into Syria at the request of Solemani and Quds....at best Assad would have kept the coastal areas and Damascus and at worst would have lost everything. So if weakening Iran was Russia's first and most important interest they never would have entered Syria and at worst lost a antique small naval base. Iran is now much more powerful having won the Syria Civil war. It will reap rewards for its backing from Assad and will have solidified gains across the Middle East.
So again times change...now does this mean Russia and iran are going to best friends and Russia is going to give fancy toys to Iran for free? No, that's not how the world of geopolitics gets played.
Furthermore, my point was that Russia could have played a part in North Korea development and subsequently from NK shared information with Iran due to them being close on missile development. I didn't imply (or mean to) say that Russia came to Iran and magically offered them advanced missile tech. The more likely route is some form of assistance to Korea that somehow made its way back to Iran. Again I acknowledge that this could be completely false, not presenting it as fact. The purpose was to open discussion on the fast track of development.