Pretty sure Ukraine had one of the better GBADs in Europe going into the war, especially as that’s not an area the West invests a great deal in.

The CNA and RUSI have both released excellent reports on the VKS challenges and performance.

SEAD/DEAD missions seem to be much harder than the US has made them look in the past (granted against much weaker GBADs than Ukraine or Russia have).

https://www.cna.org/reports/2023/04/Russian-Combat-Air-Stren...