Roommate experience

Hi all, I don’t usually resort to advice on Reddit but I feel like I’m a bit at my wits end with my roommate situation. My husband and I moved in with his best friend and his girlfriend earlier this fall in my husbands mothers duplex. We have been wanting a dog and asked them if they would be okay with this. They both said yes (although the yes of the girlfriend was communicated through my husband’s best friend). Since living together they have been really frustrated with the dog as she jumps and nips. (She’s a puppy). The girlfriend tends to scream loudly like a shrill scream. And the boyfriend tends to sternly yell and not provide positive reinforcement. I know it’s my husbands and i’s responsibility to take care of this dog and to make it clear we do! We take her on walks, feed her, and play with her. I don’t remember a time either of us have asked either of them to help with her. Recently things came to a head where the best friend started swearing at the dog. I asked politely, “I would prefer if you didn’t swear at my dog.” And he said, “I would prefer if you punished your dog when she nips and jumps,” then he promptly left the house. Classic defensiveness. I then texted the group explaining how yelling can reinforce a lot of bad behaviors (and him individually) . No one really ever responds to the texts I sent regarding concerns and I am just left on read. A few weeks ago I even was compared to a dictator for using the words, “hey! The trash needs to be taken out.” The word, “needs” is what the best friend stated made it sound like I was a dictator. Meanwhile, most of the time when I walk into a room the girlfriend just looks at me without saying as much as hello and only says hello when I do. We only have six months left and I am holding on tightly. Does anyone have suggestions as to how I get through this? I just really want to be a good person here and get through this.