The Russian have no hope at all even if we push back the clock to 24 Feb and redo the whole invasion. There are 2 major problem for Russia in this war.
1.) 200,000 troop is NOT ENOUGH to invade, let alone occupy the objective Russia wanted.
2.) Russia Logisitic turns out to be shit.
On the other hand, 200,000 is probably the maximum troop Russia can deploy to Ukraine, given the fact that they only have 900,000 troop in active service, and you need 2 rotation. So 200,000 in Ukraine, 200,000 Train for Ukraine to replace the troop they deploy. Which left 500,000 troop safeguard the entire Russian border, which is probably just stretching it if they don't post anyone in Chinese-Russian border as Russian border is huge.
Also, Russia cannot dip into their reserve in peace time, if they do that, the US and Ukrainian would know something is up, and prepare accordingly. But when you look at the different side, even if they can "Silently" mobilise Russian Reserve, they don't have enough infrastructure to support anything more than 200,000. That's why they have problem now to begin with, that's they can't even supply the 200,000 troop they had in theatre, doing more troop will only worsen the problem. The Russian needs time to move stash and build infrastructure (like service road or airport) all the way in Western Russia and in Belarus, that cannot be done in 1 or 2 or even 3 years.
I was watching the entire situation before the war, me and many military punters like me also think before the war Russia is NOT going to invade, because they don't have enough troop to do that, and the way they position their troop is destined to failed. Which is why many people, including the Ukrainian high command, did not see an imminent invasion, because that Russian troop deployment probably throw out the US top brass. If they weren't performing that badly, it would actually be a perfect pre-war set up, Russian position is that bad. Many Military analyst would agree, if Russia original aim is to take Ukraine Soil East of Dnipro, they should have only assault from North via Belarus and South via Crimea, there are no point to start a Kharkiv offensive.
On the other hand, VKS can't really do much because Ukraine Air Defence is near peer, and Russia don't have aircraft or drone like EA-18G or J-16 to do E-Dub, which mean if they fly anything into Ukrainian airspace, they are going to expect high casualty because you will need to do iron hand the old fashion way, send up a decoy and hope it didn't get shot before you shoot the SAM down, it may have work in Vietnam (even tho we still need ECM pod for Bolo mission) it won't work with Ukrainian Tor and S-300 couple with US intelligence. Tu-95 or Blackjack would probably be doing what they were doing now, which is stay outside Ukraine airspace and lob missile.