Well, well ... can't say that we didn't see that coming from a mile. FGFA, Fifth Gen India or whatever the heck else it's dressed up as, was doomed from the moment India started cozying up to America. And Russia is well within its rights to safeguard it's stealth aircraft. I mean isn't that the Americans have done in the past with the australians (F-18s), and then with the brits with the F-35s. Aircraft is a hardware platform which is built that way, and there is only so much one can do, before it becomes obviously clear that "they" don't want their tech, ending up open book to any customer, ally or not. So what makes this any different for Russia?
Heck the french did it, with Rafales and the so-called "mother of all deals". In the end, french weren't stupid enough to take full liability of their aircraft being manufactured in India. So the point is, differences are bound to take place. And it takes a heck of a lot of give and take, as each country wants the best deal out a procurement.
Also, with regards to Su-57s being stealthy or non-stealthy. Or whether it's a junk aircraft or super awesome. I think it is a well known understanding among intelligent members, that capabilities of an aircraft can and would only be determined in actual combat, against an adversary equally or near equally powerful as one. So it is somewhat amusing when claims and counter claims are made, with very convincing theories. However, that's what they really are, just theories. The unlikely scenario where a flight of Su-57s goes head to head against that of F-22s. Whatever the outcome, one can be sure, the actual truth would probably never see the light of day.
So let's be a bit more practical, shall we?!