I remember very well how in early 2018, and again in 2019, the whole defence industry community was shocked when Israel knocked out Syrian military-operated Pantsir-S1 SAMs.
It was claimed these were early models, crews were poorly trained, or that the system was turned off.
Then, throughout 2020, Turkish drones know knocked them out in Libya and Syria. This time operated by Emirati-backed Libyans or Syrians.
Again, same aforementioned arguments were used.
During the now infamous 2nd Karabakh war Russian-made, Armenian operated SAM sites were completely decimated by Azerbaijani troops with UCAVs and loitering munitions.
Systems like S-300, Tor, Strela-10, Osa were destroyed. Again, the operators were blamed.
In Irpin, Russian VDV units were absolutely wrecked by Ukrainian special forces today. At least four BMD-2 IFVs were destroyed alongside half a dozen if not more soldiers were killed.