All of these weren't (mostly) the fault of Xiaoping, but his successors.
You're right that he didn't directly implement many of those things and that things didn't really begin to fall apart until the late 90's. But he pretty much enabled all of this by crushing a popular broad-based coalition, suppressing both workers and students in 1989, and by permanently putting into power an incredibly amoral, parasitic, neoliberal elite whose sole modus operandi is to suck wealth out of China until it is eternally dead and the average rent in California is $9001 a month.