Legacy soviet AD stands no chance against modern threats.
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Take a look at Armenian losses, the majority being OSA. The Armenians also used the 9M33 missile, a very, very poor missile by todays standards. The Ukrainians are just receiving them now and are claiming 50% pK with them, that's with experienced, hardened operators (unlike the Armenians.) The 9M33 missile has a maximum engagement altitude of like 16,000ft. This gave literal impunity to anything flying even remotely above that altitude, such as the magical drones you keep going on about.
In the case of Tor MK2M, it was a weird one, the system was killed indoors, it was driving, went into a building, hit by a harop. I am not sure of the other one as i cannot particularly be bothered to look it up because it changes nothing.
The real lesson from Armenia is this:
Provide adequate coverage for your ground formations, otherwise, if you don't, the gaps will be exploited. That is it.