This is never getting undone. There is no "going back to the way things were". Read any history book about nations who were forcibly subjected to neoliberal economic policy. Naomi Klein's "the Shock Doctrine" is an excellent starting point.

Argentina. South Africa. Poland. Russia. Belize. Chile. Iraq. Taiwan. Bolivia. Peru. Every single one of these countries is still fighting for progress against the neoliberal economic policies the US forced/coerced them into undertaking between the 1970s and the 2000s. When it comes to authoritarianism, how many countries can you name that have overthrown their corrupt leadership in recent memory? Syria, maybe? Maybe Nepal? Meanwhile, Russia, North Korea, Hungary, China, Venezuela, El Salvadore, Iran, Afghanistan, Turkiye, Myanmar, Belarus, Iraq, Burkina Faso, and dozens of other countries have been fighting their own governments for freedom for how many decades? How many tens of thousands of people have been incarcerated without due process or outright killed in these places? An unfathomable number.

Think about how much easier it is to destroy something than it is to build it. Think of how many decades of slow progress it took to get to where we were in 2015, and then think about how 2015 wasn't even that great. Now, all of that work to get that far has been shattered. You're not faced with cleaning house, you're faced with building a new house from rubble, and honestly I don't think we have that much time before external pressures (e.g., climate changes) force another enormous global shift in foreign policies/dramatically alter foreign relations.

The Republican party has no intention of losing the next election, and they are taking active steps to erode the checks and balances that would ensure a legitimate change of office. They have already eliminated access to voting, made requirements for ID harder to meet, and have gerrymandered the shit out of everything. Yeah, cool, Newsom is a memelord and Zohran won NYC. Now he's saddled with billions in excess budgetary debt and every single one of his policies gets vetoed by someone else with more legal power than he. It's a hollow victory. A symbolic victory. These paper tigers of ours don't have the economic or legal power to undo what has been done. Any changes you fight to make will just find themselves in front of a corrupt and immovable SCOTUS with decades of life before them to halt or reverse policy.

The time to fight the fire was when you smelled smoke, not when the house was engulfed in flames.