It might just be the russians purposely sold them junk to protect their own interests
Or sold them the junk system and us the remote off control?!
Don’t forget from our side
ALQ-131, ALQ-213, ALQ-99 (oldie but goodie), ALQ-184 and onboard systems galore. Add to those AGM-88 and other SARM/HARM and you pretty much control what gets seen.
RADAR on a modern battlefield = bullet magnet