I remember reading that the russian crew was inexperienced in running the modern equipment, and half of it was not congifured properly althought engaged.
And that the ukrianian army used a very cheap and nasty trick.
They used a swarm of those cheap home use drones big enough to keep the Moskva's AA systems busy before they launched the Neptune strike. with the moskva's systems busy countering a drone swarm the neptunes swooped in unchallenged.
i will try and find the source if i can but it been a few weeks.