My dog doesn’t listen to me!

I have a 5 year old mini dachshund (dachshund owners you know they're stubborn as heck) and recently she's stopped listening. I tell her no, she doesn't even flinch. I say her name, she doesn't respond. She'll hop up on surfaces and steal things from the coffee table, eat off of plates, she's impossible! People in my house are also undermining me by giving her table scraps. She barks all the time while outside and doesn't come back inside, even when it's snowing. I take her on walks and there's a foot of snow on the ground so I doubt that she's offended that she's not spending time outside. She's barely food motivated, unless it's people food. What do I do?