"For me, this is just someone blabbering on about shit and making up personalities/stories around people where those personalities/stories aren't even close to fitting."
Think this line from Kaiz is key. As that's where the joy of Mince comes from for me the bizarre surreal caricatures rather than impressions. The absurdist elements are what does it for me. There's no grounding in Beardos wife loving boilers, but by God is it funny.
Completely get how it's marmite though and how it won't resonate with people but I bloody love it. My parents hated Vic & Bob but I loved them growing up.