You claim that all of these replacement suppliers will be unfindable for Europe, and that pivoting their energy or building new infrastructure will take far, far too long... but that Russia can make up for its dearth of, what was it... oh, yeah the lack of replacement equipment for the war it's currently fighting, like it's no problem despite the financial collapse occurring, drain of both qualified individuals and wealthy individuals as they flee Russia, alienation by the rest of the world, and their lack of infrastructure to create necessary things like microchips and communications equipment that they've effectively been shut out of... but no, Russia will take its shrinking economy and rally and build these things like it's nothing, in no time, despite the growing lack of every type of capitol required to do so- financial, resource, and human, while the 27 countries in the EU will simply founder and be utterly unable to do anything.
You like tossing around the word "hopium." Perhaps you should look in the mirror about who's using it the most, here. Every single thing you claim is a "deathblow" for Europe is actively happening in Russia, it's just that Europe 1) isn't fighting a war and 2) isn't sealed off from the rest of the world. And yet you look at that situation... exclusively, it seems, because China and a few other countries are... buying your oil, because you're the cheap, exploitable source of it?