Most Russians were raised under oppressive conditions. It is a different culture, mindset and business environment. It's healthy to remember that and adapt to each country as/if needed. I've been to Russia and done business and it is different but not all people are the same. There are good ones there as I'm sure you know. .
I like your idea about vetting before collaborating.
It seems that you've been somewhat burned and I'm sorry to hear that. It happens to all of us unfortunately. These are the lessons that we learn and grow from. You are free to move on to more fruitful pastures.
Good luck and thanks for the update @fyrstikken