Sorry for my confusion but I’m still not clear why Russia don’t have anything close to air superiority throughout this campaign - any articles that you can recall that explain the backstory on what happened or is it the same story of corruption/overestimation of capability/ lack of training/maintenance ?
I'm far from an expert on that (air force) side of the military, but my limited understanding is it's a toxic combination of all the above.
The Russians have certainly underestimated the Ukrainian capabilities (MANPADS and SAMS), as I suspect they believed they'd win superiority very quickly.
They didn't concentrate enough forces at the outset of combat to neutralising Ukrainian air defences, but the reasons behind this isn't overly clear.
Did they use enough precision guided munitions to attack radar, command and control and air defences? Or is the issue that they didn't have enough PGMs?
Combined with an overestimation of their capabilities, they've been given more than a bloody nose by being forced to fly risky CAS missions using dumb bombs.
They're not trained for this, their aircraft don't appear to be of the quality some expected, and available aircraft isn't great, so here is where we are.
I think they've realised that they'd have to commit a lot of aircraft that they can't afford to lose, so it's been scaled back. Counter-measures will play a part too.
I did read a good article about it a few weeks ago which will explain it far more suitably than I may, so I'll try and root it out.