It depends on what he’s thrown away really.
I sometimes have to sneakily throw away some of my DP’s things but if not he’d become a bit of a hoarder.
Last month I threw or gave away some of his old clothes, it was mostly boxer shorts and some old trainers and t-shirts. He had bought lots of new things for a holiday and we just don’t have the storage space. They were over 10 years old and he hadn’t worn them for a long time and they didn’t fit or were tatty.
Other things I’ve had to discreetly give away or get rid of in the last few weeks include:
Some dog toys that someone had brought into his work months ago and he’d taken off their hands in case we (or someone else he knows) got a dog. We will never be able to have a dog!
A stack of about 50 lottery tickets that he’d already checked but insisted needed checking again one day.
Some ancient lighters when neither of us smoke and I have multiple long lighters for candles.
About 15 GU glass dessert ramekins - we still have about 6 left for if I make Creme Brûlée but he’d have just kept collecting them.
Empty aftershave bottles.
5 wooden chopping boards (when we have multiple others) that were given to his work as a promotion.
A broken foot spa that had been in the cupboard for 5 years given to him by an old neighbour.
Old Fitbit straps when he swapped his Fitbit for an Apple Watch 3 years ago and old phone cases for his previous phones that don’t fit his current one.
He has a terrible habit of picking things up that people have left outside their door for anyone to collect, most of the time it’s useless but because it’s free he will take it.
Lots of people offload unwanted crap to him because they know he won’t say no!
He brings awful ornaments, pictures and vases home from charity shops that don’t fit the decor in our house because they were cheap and might be useful or “good for presents”. He brought home a terrible gift set with cheap rose scented hand cream, soap and Talc a few days ago because it was 50p. He knows I wouldn’t use it and I wouldn’t want to gift it to anyone.
I keep it all in a bag in the cupboard then take it back to the charity shop so it’s a waste of money and time. I suppose it makes him happy at the time and he gets very excited about his “bargains”.
If I didn’t constantly keep on top of getting rid of his crap stuff then our small house would be full of clutter.
If your DH is doing similar then I can’t blame him, if it’s things you care about or actually use then he’s just being a dick. Have you asked why he’s chucking your things away?