Due to corruption, a lot of it is because of their Soviet legacy
I tend to believe it is the collapse of the USSR which left Russia totally devasted on numerous levels, and the struggle to make the society whole again has not been been fully realized, even after 33 years. Making a society whole again is a real uphill battle. It may never be fully whole again. It has only reached its current state with lots of help from the U.S. which can't decide if it should be destroyed or restored.