People are really fed up with politics and electing more and more nationalistic/extremist politicians because they don’t feel represented. The economical crysis and this dissatisfaction is an environment very similar to when hitler got elected. Last time we had millions of people dying and europe being destroyed, what will it take today to remove a dictatorship in the biggest military spender of the world?

All true. I was really making the fine distinction between "everything is awful forever because AI" and "everything is still awful".

It's not even clear which technologies are driving the backsliding, if any. The early thought was that everyone was radicalising in a social media bubble, but then research showed being in a bubble actually promotes moderation, so that's out. It's also not just economics.

We have AI possibly disrupting a lot of the service economy, while automation is slowly eating away the manual workers jobs, possibly resulting in mass unemployment.

See, the service industry has legit uses of AI. Those won't go away, the same way people were still doing tons on the internet through the 'oughts and eventually internet businesses did become huge. Any discipline where the stakes aren't close to zero or where training on the internet can't help much will be less effected. Non-AI automation and backlash against it has been ongoing since the 1700's, so I'll put that in the situation-normal category.

Who is going to save the US if it slides into dictatorship?

It's kind of a tangent after all that, but nobody, and it doesn't seem like just "if" at this point. I'm hoping to head off expansionism into my nation and not much else at this point. Maybe rescue a bunch of the good Americans.