Riverside

Let me do one better: what is your evidence that say otherwise?

A society whose results don't match those of a personal monarchic dictatorship. For example, Saudi Arabia, a widely known example of a monarchy with absolutist power, has 80% of the population composed of immigrants without rights who get stripped of their passports and get treated as slaves. There's no public healthcare, no infrastructure for poor people (trains, public schools, people-centered urbanism...), etc.

In the DPRK, there's widespread public transit infrastructure with trains and trams, public education for everyone, public healthcare, good workers' rights relative to their level of development, people-centered urban planning, collectivized agriculture... You wouldn't expect any of these things from an absolutist monarchy.

What we have is he is the single most powerful person in North Korea

I don't doubt this, but you could have said the same about Queen Elizabeth before she got in a box

that rule and guide the country

This requires more evidence. What's your evidence for this? What material reasons do you have to believe that the decisions come from Kim personally and not from the communist party?

Ok, now, can you conceive that the Kim family's role is more representative as in a constitutional monarchy (such as that of my homeland of Spain) than it is de-facto monarchical power? I'm not saying that the DPRK's parliament is democratically elected, I'm questioning whether we can, with the information at our disposal in the west, affirm that the politics of the DPRK are controlled by one particular family and not by, say, the cadres of their communist party.

Any president can order the assassination of people on foreign soil, look at the US under Biden assassinating tens of thousands of Palestinians in Israel, or what happened to Lady Dee at the behest of the royal family of England.

But I'm not familiar with what you're describing in particular, could you please gimme a source to read on?

And how much political power does the Kim family really have? How much do we really know about the DPRK?

Would you consider the Netherlands or Denmark a democracy? Both have literal monarchies.