my dp is naturally a hoarder.
for years he hoarded, having an office in every home, and destroying it, you couldn't see the walls or floor, it stank, it was awful. when we bought outer first home he destroyed the second bedroom in less than a month. it broke my heart. we spent £10k converting our garage into an office for him and in the end he couldn't get in there, there was so much stuff (i'm crying now just thinking about it) he'd go out and buy stuff and never fucking use it and it was a waste of money and it was destroying our marriage.
i am the opposite. almost no emotional attachment to stuff. dp looked on in horror when we moved and i threw out the moses basket (£15 asda) and other baby items, he couldn't understand my cold hearted behaviour. i couldn't see the practical reason to keep it.
i came home one day and he'd brought all the stuff from the garage into the house, wrecked the carpet, and was in an almost frenzy about it. i knew i couldn't live like that any more. it was having such a negative impact on my life and mental state. he's go nuts if i moved dangerous stuff out of reac of the children even, we couldn't sit on the sofa, i couldn't stay in but if i went out i'd spend the whole time terrified of what i'd come back to. he worked for himself and from home and managed to earn well during this time. he'd insist he needed it all for work. i was going to leave him. i packed a bag, got all my documents together and planned to go to my mums.
then he went away with work, and in a last ditch attempt to save my marriage i got a skip and i emptied the garage, i went through it all, i kept 2 boxes of genuinely useful stuff and the rest went. i repainted (he wrote on the walls, gaffer taped stuff over the windows etc) and cleaned the fuck out of that garage. it took 4 full days and an 8 yard skip. when he came back he was mad, but after the initial screaming he admitted he felt relieved, that the huge mount of unsortable shit was sorted and manageable.
he's still a hoarder by design but i don't think he wants to be. he just sees a use for everything. he'll say 'oh keep that, we might need it one day' and i say things like 'if we ever need it i'll buy you another!' i'm pretty sure he's mentally hoarding a list of all the things i'm going to buy him instead.... but i can live with that.
occasionally we get into an argument and it'll come up and i have to remind him how awful it was, how his wife nearly left him, how we couldn't use 2 rooms in our house. and he admits it wasn't right and it was dangerous for the kids etc, but i think he misses his hoard. he couldn't tell u what was in it tho. he's never needed something and said 'oh i had one of those if only u hadn't binned it'
i've never told anyone in RL... it makes me so sad thinking about it... i hope you're ok OP (and others) it's so so hard to live with.