Maybe hoarding is one way some of us cope with the deep grief, collective guilt, and fear for the future, that many of us feel about the damage our civilisation has done - and continues to do - to the natural world. If so, I get it. I have to fight my inner hoarder every day. But it's a fight worth winning.
Because hoarding does not help the environment, or anyone. It just creates suffering, for you living in avoidable clutter, and for whoever has to deal with it after you.