It was very clear this wasn't endorsed or official Dredd material.
I think everyone is just being a bit precious to be honest... as though this is somehow undermining how excellent the fan created stuff has been, because it's higher profile based on the people involved. Fair enough that you don't like it, but why can't why can't those who didn't enjoy it accept that others liked it? No need to paint it as some kind of insult to the source material.
I think the fact that nobody in Rebellion, or any of the creators of Dredd, have not expressed an opinion on this cartoon should tell you all you need to know.
Not nobody in rebellion didn't not express no opinion?
Though I imagine there's just a extraneous not in there.
All of this said I think it's a testament to just how bloody good Dredd was since everyone agreed that it's mint