The gap between urban and rural development is something that has been and continues to be actively addressed. The DPRK is notoriously difficult to farm in geographically, but they make do.

The rest could be seriously challenged by Human Rights Watch reports and so on.

HRW is a propaganda outlet. Per wikipedia, itself heavily biased:

In 2014, two Nobel Peace Laureates, Adolfo Pérez Esquivel and Mairead Maguire, wrote a letter signed by 100 other human rights activists and scholars criticizing HRW for its revolving-door hiring practices with the U.S. government, its failure to denounce the U.S. practice of extrajudicial rendition, its endorsement of the U.S. 2011 military intervention in Libya, and its silence during the 2004 Haitian coup d'état.[39]

It's a functional arm of private capital that occasionally gets things somewhat right. It isn't at all an accurate way to view the world.

I understand the necessity to think outside the capitalist framework and overthrow a system that creates so many inequalities and injustices (otherwise I would not be here), but I do not think it will be achieved by praising a regime who does not creates better life conditions fot its people.

The pro-social policies of the DPRK have created better life conditions for its people. Housing rates, literacy rates, access to healthcare, and more are all much higher than peers with similar material wealth. The shortcomings of the DPRK are similar to Cuba, access to trade in severe periods of sanctions makes it difficult to progress. Lift the sanctions if you want to see the DPRK truly prosper, same with Cuba.