I’ve owned dachshunds and mini dachshunds and they’ve always been overcompensating and overly brave.
Yeah I've had a dachshund before, he definitely had the most personality of the dogs my family's owned. He didn't give a damn what size other dogs were, he was the boss. The description "big dog in a small frame" fits them.
They are amazing. An ex of mine had an italian greyhound that I adored. Best little couch potato but could tear ASS when she wanted to.