The problem with Russia is not technology, but financially. They don't have such support or backing from the requirements of their armed forces or another country.... Working on such projects - needs dollars, and in some areas - the West had advantages over the Soviets in the past, too.
Just giving the example of "Yakovlev Yak-141" - even it was under testing and if I talk about USA—F22, specific to VTOL.... and there is a history, of how the USA got the benefits from the Soviet project.
Yes, about India.. - if we need to import 5th generation fighter planes, the most favorable would be the USA if they are ready to export to India.
Russia, China, Turkey, and South Korea - are all in the primary stages of stealth technology. and if start adding sensors, and radar, etc the gaps will be wider.............................. Example : f16 planes still one of the finest planes after 3-4 decades with the upgrades.
I am not a USA lover—mostly, I criticize them—but I give credit where credit is due.