(Disclaimer: I voted against Trump and anyone who supported him in my state.)
Pretty fucked, but not as fucked as Ukraine, Palestine, Lebanon, or Taiwan.
NATO will be fucked for a while if the US withdraws, but other NATO countries may ramp up military spending over time.
This situation is a worldwide danger. The US is/was a world power, it has/had the largest national economy in the world, it has the largest military in the world.
Previously, we could be concerned that democratic countries (including the US) weren’t putting enough pressure on authoritarian countries (like Russia, China, and North Korea) to improve. Now we have to worry that the US will actually become a fully authoritarian country, like Russia or China.
On the bright side… the rest of the world is realizing that being reliant on one country for military power and maintaining stability was a terrible idea. The UN and NATO only have power if the countries are willing to enforce those decisions, and if the US doesn’t, there isn’t really a comparable backup option. The US military was always the elephant in the room keeping things generally less extreme just by its existence and not reacting impulsively.
If NATO fades into oblivion, that would be a great opportunity for European countries to make a news defense organization where a single country like Hungary or Turkey can’t play their political games.
Technically the EU already is an defence organisation (Lisbon accords), even with a stronger mutual assistance clause than NATO. What is different is that there is no integrated command structure. But that is currently rapidly changing, Germany and the Netherlands already are fully integrated (more than NATO standards are), the Baltics are making great progress.
There is at least a chance
I expect that the EU is going to have to claim defence competencies to continue the Union’s defense. There are way too many small countries in NATO that can’t contribute meaningfully to a military beyond some basic battalions and the EU needs something more robust than France and Poland.