Personal experience with the USSR? None. But I never claimed to have any. Otherwise experience: I'm Chinese originally rural but through scholarships I was put in the position to be able to earn a PhD and 2 masters and now live in a city. But this really has nothing to do with what we were talking about. I never claimed to have personal experience of the USSR.

Pray tell what makes you an expert?

I wouldn't call myself an expert but I've read many studies and books about the USSR as well as my second masters being in Marxist Theory so I would call myself relatively informed.

All of this is however a dodge that has nothing to do with the point at hand which is that appealing to experience when in reality you have effectively 0 makes no sense. If you've never worked or engaged with any facets of the state appealing to experience to draw general conclusions about it is plainly ridiculous.