I haven’t spent much time around dachshunds, but the ones I have been around didn’t seem to have nearly the please the human drive a lot of breeds have. They were mostly interested in food and murdering small animals, which I reckon is what they were bred for.
As for stupid dogs, I don’t know if you’ve been around many Brittany Spaniels, but even even the best trained birders I’ve known wear all dumb as a bag of hammers.