Some context:

I live with my grandparents, and have for pretty much my entire life. Their kids (including my mom to a lesser extent), are all complete idiots. One of them, who we'll call Walter, is my uncle and he's an alcoholic who frequently verbally abuses his wife in front of his 4 kids. So yeah, total idiot, and I'm sure you can understand why I'd want to spend as little time as possible interacting with him in any way.

So now that that's out of the way, onto the story.

Today is my 20th birthday, and so my grandfather wanted to go on a trip to celebrate it. I was naturally really excited to go, and he never said anything that would imply that it would be anyone but just me, my brother, and two of our younger siblings. I also never had any reason to believe that it would be anyone but us, because he rented out a 3 bedroom house for us to stay in over the duration.

But as soon as we got there, there was already another car parked in the driveway, which was Walter's family car. I was a little annoyed, but I was assuming that they would be renting the house next to ours since we would definitely not have enough room in the one we're currently renting. But no, they actually are staying in the three bedroom house that we're renting.

For perspective, I had assumed that there would be 5 people staying with us; me, my brother, two younger siblings, and my grandfather, which would fit the 3 bedrooms quite nicely, since two bedrooms had twin beds in them, for a total of 5 beds. Now there's fucking 10 people in this house in total. When I asked my grandfather why he thought it would be a good idea to invite a whole entire other part of the family to come stay with us in a 3 bedroom house for 4 days, all he said was "I'm sorry you're disappointed."

So now me and my brother are considering just buying an uber and hitching a 4 hour ride back home, for several reasons:

1. I don't feel like dealing with screaming children for 4 days straight. I don't dislike kids, I just hate to listen to them when they're loud and their parents have no control over them whatsoever, and they have 3 toddlers, with no control over them whatsoever.

2. I'm honestly kind of pissed that he would invite them when he knows for a fact that I don't like them, especially on something like a trip for my birthday that we've been planning for over a month now. And he didn't even tell me they were coming.

3. It's fucking cramped. We're having to cram 10 people into 3 bedrooms. It just doesn't work.

So, the reason I'm making this post is because I definitely would feel bad about just walking out on a trip that my grandfather wanted to give me for my birthday, but I definitely don't feel bad about walking out when I'm sharing a house with a toxic couple and their obnoxious children. Am I in the wrong here?