Also look at the effects of sanctions against Iran and Venezuela. Both are collapsing.
Imagine the effects of sanction on an economy as big as China.
The Russian economy is growing, not withering: "Although economic sanctions tightened, [...] Russian economy expanded at a 1.6 percent pace in the year just ended," - [1] (or [2] if you think rt.com is fake news).
> massive population outflow for Russia
It is true that Russia population is decreasing, although Poland, Germany, Hungary, Japan etc are decreasing even more [3]. It's hyperbolic to describe this as "massive".
[1] - https://www.rt.com/business/448357-russian-economy-grows-san...
[2] - http://www.worldbank.org/en/news/press-release/2019/01/08/da...
Sanctions against China would be fairly painful for the rest of the world, too.
Right... that's my point: the relative impact of cutting off ties to China would be pretty large, given that it's the worlds factory. They would be worse for China, but more painful for everyone else than existing sanctions.
Tariffs against China didn't have much impacts on European/US consumers.
You get the idea.
Russia isn't an export/manufacturing powerhouse, unlike China. The one thing that Russia does export that EU consumers are about - oil & gas - isn't subject to sanctions.