Your propaganda based on wishful thinking is not very relevant on top of it.
The cooperation ended 9 years ago. I can’t think of any system where the Ukrainian components weren’t replaced.
As for the performance of the weapons the people procuring weapons aren’t interested in popular propaganda as pushed by Daily Mail.
If anything, the war proved that systems like Javelin are snake oil, killing 100 more their operators than they hit tanks, HARM missiles are more than useless against mobile air defenses, and NASAMS are useless against cruise missiles.
I won’t even talk about M113s which fail to start in cold weather and froze to the ground, because it is not a recent technology.
There is a reason why F-16s and Abrams aren’t there, becsuse they’d make a PR disaster.
Nothing like that was discovered about Russian weapons which mostly work as advertised.
I am so glad to hear that, due to supposed poor performance, you are not concerned at the inflow of US and NATO weapons into Ukraine. Surely then, Russia has no cause for complaint. Bring on the Patriot missile batteries, Predator drones with Hellfire missiles, longer range HIMARS, the Challenger, Leopard, and Abrams tanks, the M1 Bradley and Marder IFVs, and anything else that the Ukrainians want from the US and NATO. Are we in agreement, I hope?