Laugh! Laugh at the inferiority of the untermenschen-crafted weapon! 
Featuring such golden comment chains as:
One a/c on the assembly line. Look at manufacturing sites for F-35 and F-22. Dozens of aircraft lined up. That’s the difference.
That’s the first thing I noticed. Russian industrial capacity has literally collapsed, I never realized they were this weak. Compare that to their Chinese allies who have been able to produce an impressive number of J20s pretty fast even though the SU57 had its test flight earlier
Too many people stealing money and limiting their capabilities. Good lol*
*not like our trustworthy Raytheons and Northrop-Grummans, of course 
Same energy as when redditors find a picture taken in 2004 of a run down Khrushchevka in a half abandoned mining town and use it as evidence that the Soviet Union/Russia is one giant slum