Argument over Hamster Cage

I’m smad (sad+mad). My boyfriend and I were working on cleaning out and re-doing our hamster’s (giant) cage, and I ended up feeling the need to leave the house (I’m in my car in a random (safe) parking lot right now). Things were going well, he was scooping out old bedding, I vacuumed the cage, we start putting in new bedding, get into a little squabble because I wanted to pack down a bit more onto the floor, but no biggie, I let it go. He mentions doing a top-layer of the new dirt we got, and I say, ok, that’s not what I had in mind but that should be good👍. He asks, so I say I imagined doing like a mound of it or something the ham could dig into. He looks at me like I’m crazy. I say, or a mound against the platform we have. His expression gets milder, and he says, oh, like a dig-box I (he) was talking about earlier. I say yeah, kinda like that. He asks me if I want to build a box for that. I say no, I wouldn’t know how. The expression gets worse. He says, just a little cardboard box. I say, ok, go ahead. He says, no, just take four pieces of cardboard and tape them together or something. I say, ok, I don’t know how (what cardboard? What hamster-safe tape? How big? Four pieces of cardboard? How would that make a box?), but you can go ahead and do it. He says, what? It’s just four pieces of cardboard to make a little box! I say, OK, I DON’T KNOW HOW. YOU CAN DO THIS AND SHOW ME (for next time), BUT I WILL NOT BE DOING THIS. He looks at me like I’m insane. I tell him he’s looking at me like I’m insane, to which he replies, it is insane and that I’m just not listening. I stand up, crawl into bed, blast my headphones and cry for a minute. Then I get up, go see where he is (I thought he was outside smoking but he was in the other room making the box), and he shows me the square-shaped frame he made from one bent piece of cardboard that he stapled together (and don’t worry, he didn’t end up putting it in and giving staples to our hamster). He shows me, acts like I should have known this, and says, see? I told him, ok, I didn’t know that’s what you were talking about, and he says that’s cuz I just wasn’t listening. At that point I said ok goodbye, grabbed my keys (told him I was gonna go take a drive and that the hamster was still in his ball) and drove a few miles away to the parking lot I’m currently sitting in. I’m gonna go back now, but I’m looking for whatever anyone has to say about this. I just know it doesn’t feel good and I felt small/stupid/invalidated with the whole situation. Sorry for the long post, I wanted to give the full thing.