Complacency.
The west had a golden age from the fall of the Soviet Union, removing their main rival. It also reinforced its reinforced its belief in the inevitably of progress (the "end of history" nonsense, for example). They cannot now cope with threats or danger.
That said, comparing the west to Russia, China etc. is a gross exaggeration.
China has much lower crime, cheaper healthcare and is making progress in other aspects.
We’re rapidly regressing into prideful ignorance. People are being encouraged to drink raw milk and fear vaccines.
19 century illnesses are making a resurgence.
Citizens are being indefinitely detained for “looking” like immigrants.