I think EU will be fine, it really depends on how much the US cares about advancing Russian interests.
Long game, the UK may transform into being a sort of vassal of the US, assuming it survives as an entity. The EU interest may align more with China. If the US is de-empathizing NATO, they need a counterweight to the Russia/US axis.
It's the end of pax americana, and the future is more uncertain.
Or this is maximum negative emotionally charged sentiment and 5 years from now won't look all that much different.
It is really that you should just read what Peter Zeihan says and know that is exactly what is not going to happen.
Disrupting global alignment creates risks and unpredictability. Especially when driven by a cult of personality. Things that had 1% probabilities in 2010 will have 25% probabilities on 2030.
Zeihan lives in a 1960 worldview - oceans are not a meaningful barrier now as space and nuclear technology proliferates.
Withdrawal from the world was stupid in 1920 and doubly so now. There’s a lot of magical thinking that humans who live in places that aren’t in North America lack the ability to think or plan.