Pure and simple - Sukhoi hoped to get into Embraer and Bombardier field of aircrafts which is understandable. But the way they executed it, it seemed like they were hoping for too much. They pretty much went with all import technology, holding tenders for lowest bidder, slapped it together and called it a Russian jet (I have proved it multiple times in here, and not that wikidot BS), and what ends up happening? Pretty much, only Russian companies purchased it, and even then, complained about it (Aeroflot as an example). Now they are trying to push out a model using foreign engines now? The SaM engines were already joint venture between France and Russia. Now they just want to go with something done entirely outside, even though engines are not the issue at hand.
I seriously hope SSJ fails, and by the looks of it, it already is (sorry, but 30 orders from Indonesia, and 20 from Mexico is far FAR from a success).
MS-21 on the other hand shows far more promise and I hope that it is successful. But even then, some news here and there indicate that they may try to go the SSJ route and import everything, slap it together, and hope that it works. Cause the sad reality is, just because it comes from outside, does not always make it better.
They really need to work on what people want, not what is the easiest to slap together and hope to sell. These civil aircraft manufacturers seem to be pretty incompetent in Russia. They are all trying to make a quick buck and not think of the future.
I wonder though, if SSJ does become successful, will USA blacklist Sukhoi Civil Aviation, or UAC altogether, like they did with T-Platforms? I would laugh if they did, and see the look on the CEO's faces as they think "Oh crap, maybe we should have invested more in domestic production".