Although ultimately there is no mystery here.
The Soviets had a real commitment to science and technology. It was one of the few silver linings of the communist regime. Present day Russia is devoid of that commitment. You can say that lack of funding is the problem (and there is that), but even more troublesome is the apparent lack of leadership. There are no driven, fanatical figures out there trying to set up a vision for the industry. Absent drive from the top, the industry is at best in maintenance mode, trying to keep Soviet heritage pieces flying.
Case in point, Roscosmos hasn't had a space engineer for a director since the early 2000s. Rogozin is a career politician, educated as a journalist. Before Rogozin, Roscosmos was ran by an automaker named Igor Komarov who came from Avtovaz. Before Komarov, there was a string of Army Generals during the 2000s (Gen. Nikolai Ostapenko, Vladimir Popovkin, Anatoly Perminov). Car manufacturers and ICBM generals are not the people who will lobby the political leadership for a basic space program.
Oh well. Whether things will change, I dunno. I think before they do, there has to be a realization at the top that education and science are important. Right now they are playing third fiddle to guns and butter, and all we get are Rogozins whose solution to everything is to put lipstick on a pig.