The feud between former Mayor Bill de Blasio and former Gov. Andrew M. Cuomo is one of the most bitter in New York City history.

Mr. Cuomo’s run for mayor this year has reopened some of Mr. de Blasio’s wounds. In a blistering 30-minute interview, Mr. de Blasio revisited his disastrous relationship with Mr. Cuomo, accusing him of undermining the city and saying he was unworthy of being mayor.

Rich Azzopardi, a spokesman for Mr. Cuomo, said Mr. de Blasio’s comments were in bad faith and accused him of allowing the city to fall into decline and embarrassing himself by trying to run for president.

Here are excerpts from the interview. It was edited for length and clarity.

1. Do you think Cuomo would be a good mayor?

No.

Why?

I think Andrew Cuomo would simply deepen the troubled status quo in the city. The city has become profoundly unaffordable. A lot of that is because of policies he put in place at the state level. And it’s quite clear his interests align with the wealthy and the powerful and the real estate community. So he is not someone I would depend on to address the affordability issue.

2. How did he hurt the city in terms of affordability?

When he was governor, the state never created a meaningful affordable housing program that really reached deep into New York City.

My administration created an initiative to house 300,000 families. We never got meaningful support from the state. We didn’t get support in terms of dealing with homelessness. We didn’t get support in terms of dealing with public housing.