AIO by telling my husband that “our” house is my house?

6 years ago I was privileged enough to inherit money from my great aunt. About $300,000. I used this money to buy a 1300 sq foot, 3 bed, 2 bath house for myself and my husband.

It was established when we moved in that we’d use one bedroom for our obvious bedroom and we’d each get a room to use as our “offices” aka whatever we want. Initially I picked the room that was coincidentally eveeeer so slightly larger (like 20 sq feet) because it had a cool paneled wall.

Well, when we got to move in day, my husband insisted on taking that room because he needs the space. He said there was “no way” he could take the other room. Well, I let him have it because he has a lot of hobby stuff (music gear and gaming materials/figurines whatever).

A year into living there, all of his hobby stuff began spilling over to the rest of the house. Into my spare room (which I made a guest room), in ALL closets, on kitchen counters, mutual living areas, just filled with his stuff. Despite getting upset about this, he told me that I was being unreasonable, that I wasn’t using the guest room for anything “important” therefore it’s unfair to gatekeep it when we have no guests over and want it to look pristine all the time for the sake of wanting it to look organized and cleared out.

Four years later we had a baby. After our son was born, I turned the guest room into his nursery and my husband continues to store his spillover in our son’s room. I told him to stop doing this, that this has gotten completely out of control and he argued and tried to justify this to me.

I finally had the biggest breakdown of all time. I went into a fit of rage wanting to just throw all of his things left out on the kitchen counters into the garbage, but instead I yelled out to him that this is MY house, I brought this contribution to our relationship, and he has no respect for it. He got extremely hurt and told me that it was completely unhinged of me to say that, that I didn’t pay for the house with my own money, and that I’m being possessive and completely overreacting to it all, that it’s no big deal that his stuff is out everywhere.

Am I overreacting?