@ToddlerTornado To try and be constructive, what is it about the individual breeds your family members don’t like? Or what makes the want the mix? And please don’t say appearance.
Dog genetics are tricky. I just bred my Golden Retriever (colour: Golden), with another Golden Retriever (colour: Golden). Both sets of grandparents and great-grandparents were also colour: Golden. But the puppies? I had Gold, Golden and Cream.
In my last litter, all were Golden. And the sizes of the dogs ranged from 30kg-42Kg - both of them were girls and the heavier one was not fat. Just built.
So, even within breeds everything can vary. And within litters, everything can vary. So I’m not sure why you would purposefully cross two breeds - particularly if the reason why is because there is an aspect of one breed you don’t like and hope to remove (which so often seems to be the case).
Mongrels don’t necessarily give you the perfect dog, particularly as their form and temperament might end up confirming to neither breed. It’s seems a bit foolish to take a gamble - because what if, as is often likely, you end up with the worst traits of both dogs.
But I would also add, good breeders with healthy dogs don’t breed the sort of dog your relatives after. So your rataoves already starting from a less than stellar baseline in this quest. That makes the chances of undesirable behaviour, poor temperament and poor health a lot higher.