That is certainly not the case for the MIC. The Russian MIC is leading edge. And Russia has certain industries like nuclear power with Rosatom which are also leading edge. It is correct a lot was not produced in Russia proper, and ended up in the other SSRs, but Russia has spent almost two decades reproducing a lot of those capabilities inside Russia. It has lost access to some important things like civilian shipbuilding. Large ships typically built in Ukraine and fishing ships in Finland. Just recently they were still ordering fishing ships from Norway. But more recently they moved production of large fishing vessels to Russia as a way to load Russian shipyards. And the largest shipbuilder in the world is China. If Russia really needs to they can order civilian ships from China like everyone else does.
To a large degree, Russia did not bother making certain products inside Russia because it was easier to import them, but do not mistake lack of current production capacity with lack of capability. One good example is the marine gas turbines. They were done in Ukraine. And guess what, Ukraine was supposed to pay back the gas they got with something, and gas turbines were one of those things. But a country which can make aviation gas turbines can also make marine ones. So they did. It took like 4 years. Same deal happened with helicopter gas turbines or micro-turbines in cruise missiles. Right now, the Russian civilian power industry is concerned with the embargo on parts for large civilian gas turbines used in power generation. Well, Russia has already been designing their own for like 7 years, eventually you will see them enter service. Once again, this is the same technological base, they did not need to make their own so they imported, but after Crimea and an embargo on sales there they started the project. Civilian aviation will end up the same way. People forget the Soviets used to have a leading civilian aviation industry, used to be the second largest in the world, the Tu-154 was one of the most sold civilian transport aircraft. And guess which are the top five largest aviation markets? China, US, India, Indonesia, and Vietnam. And Russia has good relations with all of them except the US.
China just by itself has a gargantuan industrial capacity which can displace the whole West put together. Even just two decades ago Russia bought next to nothing from China. Right now they are their major trade partner. And this will accelerate.