The Panderverse premise was funny, I enjoyed that, my issue with the episode was Randy’s arc. The whole I can’t fix anything trope, what happened to “White People Renovating Houses”? He’s one of the few people in south park that knows how to do all the construction stuff.
It’s just South Park. Continuity will sometimes be sacrificed for the sake of comedy…SOMETIMES. Unless you want to argue that maybe the episode takes place in at a different point in the timeline.
It’s also not unusual to forget things as well. I spent about 5 years as a white person renovating houses, and it’s been almost 5 years since not doing that anymore and there’s a handful of things i forgot.