In my opinion, back in the 1990s, the US and Europe should have presented a plan for the long-term integration of all the countries of the former USSR into the world community. This applies to both Ukraine and Russia. Both of these countries were to be admitted to the European Union and NATO (North Atlantic Alliance). At the same time, a roadmap was to be drawn up for the entry of these countries into these organizations.
Both Ukraine and Russia are two big fragments of one big country that no longer exists.
And you can’t say to one country - we will help you integrate into the world community, and to another country to declare - but we do not want to know you, go to hell! Solve your own problems! Build your sovereignty however you want, be friends with whoever you want - you can be friends with the Chinese, you can be friends with Iran, you can be friends with North Korea, you can be friends with the Devil himself. Your fate does not interest us, from the word "absolutely".
This is a wrong position if a country positions itself as the supreme (most important) integrator of all world processes.
They should have but didn't. And there are many reasons.
Starting with the fact that Russia has always presented itself as supposedly the "heir of the USSR", and they say that it is she who represents the interests of all "smaller brothers". And many have accepted this position. Someone because of corruption interests, someone was simply not interested in bothering with "small countries", someone simply had their own interests that had to be solved either by themselves or by the hands of Russia ... Although in recent years, for example, Ukraine's integration into the EU and the world economy has intensified. I will tell you this fact - until 2014, many competitive Ukrainian products were sold to the world ... through Russian companies or under their control. At the same time, direct contact with the EU and other countries was extremely difficult. But for example, in 2017 I personally signed a direct contract with a company from the EU to provide IT solutions, and I still work with them. The whole procedure of registration and registration took me only a few days - and no difficulties!
And the scheme of work "through Russia" and "under the strict guidance of Russia" - this is still going on, but in other "brotherly" Russia republics. Although all of them have already understood that Russia, in fact, "sucks" out of them for a penny products that are competitive or necessary for Russia itself, and sells them exclusively.
Have you read the documentation of the "Customs Union"? Highly recommend. In fact, it is openly written there - Russia controls everything in the union, and where it does not control, it makes decisions - to allow or prohibit!