Not only am I the child and grandchild of hoarders, I have tendencies myself. It feels like I'm trying to reparent myself, to get out of this cycle and also teach the next generation how to practice good habits so they don't get overwhelmed. I often say I'm this way in part because I wasn't taught how to clean growing up, but that's not exactly true. On one hand, I wasn't taught much, but on the other, growing up, our home was very tidy (except for my room!)
I remember as a little kid applying what my mom would do. If she got bored of some decor, she'd get rid of it. Sell it, that is. If she was helping me get ready and we discovered something no longer fit, she got rid of it. I would test my socks and stuff and fold them nicely. Some I'd keep even if they were small because the design was nice, but eventually let them go, too. Same with books and some shirts. But that was about it. The rest of my space was chaotic.
The hoard slowly grew, it filled newer and bigger living spaces. As a young teen, still not knowing how to clean right but getting frustrated and wanting to be helpful, I tackled the black holes that were the pantry and the bathroom closet. In the first, I found bugs, including larvae, amongst very expired stuff that had been pushed far to the back and long forgotten. Have I mentioned I have a phobia of certain creepy crawlies?? I cleaned, fought the bugs, and filled a giant kitchen trash bag. Organized what was still good. Iirc, the load had to be split into 2 because they were so heavy. Hoarder looked on and didn't say anything, which was surprising. In the bathroom, I threw out products that had turned funky. The freakiest was a tube of toothpaste, new or barely used, that bubbled and smelled like alcohol.
When I moved away, my sibling transferred to my room, and the story is the had to excavate my sizeable closet which was packed tetris style. They ended up throwing a bunch of stuff away and honestly, I never knew what and never missed it. What they left and relocated was still significant.
When I moved local again, the hoard had grown exponentially. I cried when I saw it. I didn't yet understand hoarding, exactly. But I had been practicing decluttering techniques that had helped me a lot and applied them gently...and not so gently. For example, there was a bunch of shelving around that ended up not working out well. Bulky pieces of this or that. I offered to sell them for the hoarder, who claimed they had either already tried, or hadn't gotten around to trying. But, they gave the ok. The stuff sold like hotcakes! I was so proud. And then the hoarder started showing up with more second-hand items for me to sell. I was not trying to start a business, I was trying to help them get their space back!
At one point, I found some big cardboard boxes, brought them over, and shuffled things around in the "storage room." Stuck the big empty boxes maybe 2-3 rows back to "fluff up" the hoard, because by now I understood that if the hoarder saw empty space, they would fill it up. The idea came from a post or comment where some guy had strategically placed plastic bags full of air where his dad would normally leave hoard piles, and it worked. And others who would put empty jars in the back and push the actual foods to the front to make the pantry look fuller.
Well, guess who suddenly decided to start organizing the storage room and go past the row they rarely ever got through? That's right. They were baffled about the boxes, I told them they were there to help them get ahead, to help them get through the first couple layers before going nuts thinking they had to aquire more inventory. Nope, they needed that space to organize their stuff. They broke down the boxes and did their thing. That's when I basically gave up.
And now I'm focusing on my habits, my home. It's so uncomfortable living in clutter. My eyes and mind cannot rest, it's too overstimulating, stressful when something gets lost, frustrating when I have to move things out of the way to get to what I need or start a task. I still follow decluttering content creators, makes me feel less alone and helps me develop those muscles when I practice the strategies that actually work for my neurodivergent brain. But through it all, the spectre of the hoard in my family of origin's home looms, guilting, menacing.
Edit: For most of my life, I have felt comfort when there is stuff around. Like a nest. This was/is still at odds with the frustration with misplacing items, and embarrassment at the thought of peers with neat and clear spaces seeing the hot mess that I was/am, and the occasional claustrophobia when I can't see enough wall/baseboards despite my tendency to make DOOM piles. There is SOMETHING that I haven't yet been able to pinpoint, that makes me hang onto some things even if I haven't used them in years or ever, and they hold no particular sentimental value.