Sending overwhelming numbers of poorly trained conscripts has been the Russian way of waging war since WW1. They actually still (as I'm sure you know, you're much better informed than I) have some decent equipment, it's just too specialised to be of any use when things aren't going as they want. They're also crap at joint arms ops and all of their junior officers are too terrified of reprisals to take any initiative.
One interesting thing I read about the air side of this conflict was that whilst the Russians supplied somewhere in the region of 120 fighter bombers for use in Ukraine, they only sent 70 pilots.
I think that’s because they have major issues with the serviceability of their aircraft. Sanctions have made this problem even worse. Same with their other equipment that they’ve been pulling out of storage. A lot of it is old and poorly maintained.