Yes because there were deep systemic problems with the government and economy of the USSR at the time and the breakup was an inevitable result of the powers that be doing the wrong thing for so many years while business and some of the most productive citizens fled to Europe and the US. We're seeing the same thing right now in Venezuela, although Venezuela was never the world's second superpower. Also, Russia's biggest gains (and maybe what saved them after the collapse?) was energy in the form of oil and gas. Venezuela too. If alternative, readily available energy sources take off, this makes natural reserves of oil and gas less useful. Again, we're seeing all this play out now.

No because here we are today. The brexit and weakening of the EU will only strengthen Russia. Why support the EU over Russia? The EU, afaik, does not kill reporters and dissenters. That says a lot about a political organization's philosophy right there.

In general, I think it would be great if everyone on the planet lived in some kind of operationally transparent, porous, federated political structure, and Britain's involvement in the EU was a big step in that direction (which still had many steps to go). This is a step backwards. Meanwhile, today's Russia would do a lot better if they tried a carrot instead of a stick. In any case, now is not the time for leaders to get up from the table and walk away, it doesn't lead anywhere good.