Mayor Bill de Blasio took a lot of heat this year for the city’s homeless crisis. Yet after all this time, he’s only at Square One when it comes to addressing the problem.

And what better symbol of the disarray than his appearance last week with one-time political foe Christine Quinn — who now runs a nonprofit for homeless women and families — to discuss the issue?

The event was meant to show the mayor is in control of the situation, and Quinn spoke well of Team de Blasio. Yet it came off like an act of desperation by Hizzoner.

Remember, the Department of Homeless Services is without a boss — and the agency itself may even be scrapped in a restructuring. The city is only now reviewing its policies and its organizational chart for dealing with the city’s homeless.

What’s taking so long? The Post first began writing about the problem in July. Back then, de Blasio pooh-poohed our stories — about bums like John Tucker, who was turning Upper West Side streets into his own bathroom — as mere “fear-mongering.” At one point, he even claimed the number of street homeless was falling.

Things went south from there:

Deputy Mayor Lilliam Barrios-Paoli — a veteran of five mayors and an expert on the homeless — quit in frustration, unable to get the mayor’s ear on the issue. She has yet to be replaced.

Police Commissioner Bill Bratton admitted the administration dropped the ball.

Homeless Services boss Gilbert Taylor was given the heave-ho, and Steve Banks — who spent decades fighting for the rights of the homeless to stay on the streets and who now heads another city agency — got expanded homeless duties.

True, the mayor did announce some new outreach efforts and a tracking program called Home-Stat. And Bratton called for new laws to crack down on street bums.

Sorry: Too little, too late. Summer, when street bums pop up like mushrooms, will be back soon. De Blasio had better get cracking.