Russia still has huge problems with its shipbuilding industry.
Russia never had a huge shipbuilding industry, neither a military one or a civilian one... except possibly for submarines which they used to have enormous numbers of.
Right now Russia needs a 11 carrier fleet like it needs cancer... building military ships at the rate China is currently making them would be seriously unhealthy for Russia because pretty soon they would have an enormous military fleet that would suck money from the budget and not serve any useful purpose any time soon.
Russia doesn't need enormous numbers of new Subs and big ships and carriers right now... nor does it need them in the next 5 years.
In ten years time some larger ships will be useful to replace upgraded vessels, but for now new corvettes and frigates are fine... the equipment and systems they use are fully scalable so if they need a Destroyer or a Cruiser they don't need to invent new big anti ship missiles, they just need to work out how to pack UKSK-M launchers on board to most efficiently use the available space and use much larger AESA radar antenna arrays and bigger sonar arrays etc etc and fit nuclear power units to provide power for it all.
The large shipyards that will build their CVNs can also build 350K ton oil tankers and gas carriers in their spare time that will generate money for the economy.
Production of frigates with a capacity of 4500 tonnes proj 22350 goes very slowly. The second unit is just entering the service.
That is true, but these frigates are better armed than cold war period Soviet destroyers, and now that they are tested and fully ready for service they can start making useful numbers of them and start to withdraw older vessels that were being used for the same roles.
More important is that these frigates are fully multirole so there is a lot more flexibility and capability so the vessels they replace will allow improved performance as well.
They don't even have anything to dream about the ocean fleet.
In 5 years time they will have the K back at sea and probably at least one Kirov class back in the water to allow testing of the new modular systems on much bigger vessels in much bigger numbers... They can start expanding their trading horizons beyond those countries they share a land border with and can negotiate more equitable terms when they get alternatives to the ones available to them now... it will be good for Russia and the rest of the world.
Expensive or not, all this will take time...a long time.
You are clearly a fan of Chinese stuff and China... surely you of all people would realise there is no rush.... it is more important to get it right than to get it right now... because getting it right now means debt and debt means foreign powers have influence where they did not previously and their influence will generally shift your policy towards things of their interest rather than Russias interests... so it is bad for Russia.
Right now Russia is secure... shore based power and air power and sub and coastal ship based power and power projection makes Russian territory as safe as any territory on the planet... more safe than most actually, so there is no rush to spend trillions right now.... billions over the next 2-3 decades should develop a powerful modern mobile fleet that serves Russia well.