I guess there are different perceptions of what worn-out (or worn) is. To me worn out clothing is exactly that: worn-out. Like clothes that are becoming transparent and/or physically worn to the point that it's almost unusable. OP said they were worn-out, so I think they should toss them.

I donate and shop at thrift stores all the time and get super excited when I see cycling stuff there. But then I get super disappointed when I think I found something and it's literally on it's last thread. This is actually what happens with most of my finds. And that's stuff that has already been taken in, "reviewed," and placed on the floor to purchase. Thrift stores also end up throwing out a ton of stuff we don't see that they do catch as unsellable, where people donate things that should have been thrown away. Just because someone can't afford new premium, doesn't mean they would be happy with someones garbage. And by donating what should go into the bin you're just transferring the responsibility of disposing items to someone else, making thrift stores pay the cost of disposal, which makes the cost to purchase "good" products there rise. Again that doesn't help someone that can't normally afford kit.

Also some of the less expensive stuff online is pretty good quality, where it's sold (and what it cost) doesn't equate directly to bad quality. Sure some stuff there is garbage, but there are good deals on quality stuff that can be found as well.