I wouldn't doubt the so called next get fighter is a flying bag of shit

It's not a direct comparison, but during the NATO bombing of Serbia, a clever commander using a 40-year-old SAM system was able to shoot down an F-117 Nighthawk:

Here’s how the Serbians were able to detect and shoot down an F-117 Stealth jet during Operation Allied Force (The Aviationist 3/12/2016)

Even if the S-125, which had entered in service in 1961, wasn’t considered an effective threat by the American aircraft flying over Serbia, Colonel Dani Zoltan, who commanded the SAM battery of the 3rd Battalion, was able to turn this ancient surface to air missile into a lethal weapon. In fact in addition to the F-117 kill, later during the air campaign, on May 2, 1999, Zoltan’s battery shot down a 31st Fighter Wing F-16C, the only other allied plane to be shot down by Serbian air defences during Allied Force.

Even though the article seems to expose a weakness of US stealth technology, I believe it's actually whitewash and disinfo. They attribute the defeat to some "clever precautionary moves" on the part of Zoltan, but a number of years ago I heard an interview with Zoltan himself and that's not what he said.

It was not a technical interview, but Zoltan said that he learned from the work of Tesla (a fellow Serb) that everything had a frequency. Since this old equipment was tunable, he calculated and then just played around until he figured out what the frequency of the F-117 was. Then he fired a SAM and that was that, no luck involved.

IIRC, the pilot eventually met Zoltan and they got along well. He admitted, "Yep, they dialed me in and got me good!"