Yes, as much as demographic decline is a big problem, the bigger one is the total and deep institutional corruption.
There's actually an inverse correlation between corruption and GDP, and a few studies showing that lowering of corruption directly boosted economic prosperity.
I wish more people actively brought up corruption, literally the most fundamental thing to fight.
The corrupted politicians and people are only interested in enriching themselves at the expense of everything else. For them being a client state of either Russia or the EU makes no difference because they know that to reverse the course of the country it takes more than one generation and nobody has time for that especially when you are buying your next super yacht.