Both Su-30 SM and Su-35S have performed exceedingly well. Don't judge them based on western propaganda.Western MIC have a general apathy for russi stuff and its more visible now.
Russi for their part, have protected their Su30sm lot, which is probably the only jet they have bought themselves in numbers, and upgrading those to SM2 standard, that shows the trust they place on these jets. Like su57, these also have made very rare & handful appearance in combat duty so far, and Rus have been doing air superiority missions daily for past few months.
It's the Su-34 that has disappointed most. Apparently, they are going to upgrade them soon. This war has also given Russia clear perspective about the future of air power.
IAF must also keep a close watch and adapt accordingly.