Novel alert!

I've been with this family for almost three years and love the kids and the parents aren't too bad either. The dad NEVER comes home when he says. Now I don't mind working a lot cause $$$, but when he says he's gonna be home at a certain time, I look forward to getting off at that time and he's always late. I feel like my time isn't respected. The house is always dirty, I don't even want to take my shoes off, if I didn't do the dishes or wipe off the counters or vacuum, etc. they'd never get done. Those are frustrations that are contributing to me wanting to look for another job. BUT THIS DAMN DOG!!!!!! They got him about 7 months ago and I'm about to fucking lose it. I told them I didn't want to look after a puppy, they got him anyways and who spends the most time with him?! Me!! I hinted at how much work he was (worst puppy ever, did every bad thing imaginable) and they just laughed. No pay raise either. I hint every day that I don't like him and they just laugh. He bites hard, jumps, scratches, barks, the kids are scared of him and I HATE him. I have never felt this much anger towards anything and every single day I'm tempted to just say I quit!! How do I basically tell them it's the dog or me?! In addition to mentioning my other concerns, you can't really tell someone their house is gross. And now she's pregnant so I'll have a fourth kid in a few months😭😭😭😭 but I haven't found any career fields that I can get into while I'm in school so I feel stuck. Help!