No one's utopia rises from the ashes of a collapsed society. Usually collapse is followed by a run of short-lived autocrats, until one of them (or a coalition) sees the trend and is determined not to be the next dead dictator. They then create a constitution and none of them are elected as the executive.

By then everyone is desperate for some quiet, and no one really cares to be king anymore. (Cromwell was unique in handing the theone of England back to a family with some royal legitimacy, but that was before the ideals of the enlightenment.)

What we haven't tried yet is crafting an ironclad constitution before or during the violence. Were I not a depressed misanthrope with no organization skills, I might have developed an online website that tracked the constitutions of the world (as cross-translated as possible) and made workshops for hypothetical clauses, such as ranked-choice US presidential elections won by popular vote. The point would be to make a site where fledgling states could hammer out ironclad constitutional clauses toward an actual public-serving state. Sadly, I'm pathetic and didn't do this. And no one else has either.

The more prepared grassroots movements are before the collapse, the less churn of warlords the state has to suffer during the aftermath.

Note that corporations, rich masterminds and foreign interests will still offer finances and materiel to shills to take over and serve as a ruthless puppet dictator. These will be your most difficult adversaries. The DPRK shows us how bad that can get.

Anarchism is about building from the ground up with mutual aid organizations, which create the infrastructure that will support labor unions, community service orgs and other public serving interests. Since these serve as a sneak attack on elite-serving establishment, accelleration doesn't help them, though mutual aid will help neighborhoods survive when the collapse comes.