In the video I linked to they clearly show that when the Su-27 variants were matched against a team of JSFs, Raptors, and Hornets... that the Russians were superior to the point of having the simulation referred to as "like clubbing baby seals"... That is kinda specific, I guess...
"Can't turn, can't climb, can't run"Clubbing baby seals referred to the F-35. The F-35 was never intended to be an air superiority fighter, thus such a description was apt.
The F-22 will chew up an SU-27 with no problem, and the F-15 current generation will match it stride for stride.