A bit late to the party here, but I'll chip in anyway. I got sucked down into a fairly deep rabbit hole while researching a magazine piece from an issue or two ago. It was about Patagonia's "Worn Wear" program (
https://issue30.ontheflymag.com/index.html?page=38), but I ended up digging into the whole Gore-TEX mess. There's a LOT to unpack there; you'll find a little bit in that article, but just search "is goretex a scam" on Google or YouTube and you'll be off to the races.
The short story is that A) several of the materials used in waterproof gear (rain shells and waders, mostly) have historically been quite toxic in the manufacturing phase, both for the environments around the factories and the people working in them, and B) when used in the outdoors, those materials shed small quantities of harmful "forever" chemicals, and C) the materials themselves are effectively "forever" products in the sense that their half-life will be measured in centuries, making disposal problematic.
Some countries have passed some laws to curb the manufacturing ills, and some companies are taking pains to be more responsible. For consumers who do need serious rain and wading gear, the right answer is probably to choose wisely: attempt to buy just once, then prolong the life of the product as long as possible through responsible maintenance and repairs. Don't buy a new pair of waders - just patch your old ones! When it does come time for retirement, seek out a reputable operation who will recycle the materials (thus Patagonia's "Worn Wear" operation, but also check out the next article about Recycled Waders) or dispose of them responsibly.
https://wornwear.patagonia.com/
https://www.recycledwaders.com/
Meanwhile, there's another whole knot to unpick around whether Gore-TEX and other similar "waterproof / breathable" fabrics really do what they say. It turns out that Gore-TEX is waterproof OR breathable, but not both at the same time. Watch the videos - they do a good job of explaining why, and the patent expiration stuff is interesting as well. Also, a fair bit of what really keeps you dry inside a rain shell is the hydrophobic DWR finish, which gets you back into toxin territory. Like I said, it's a rabbit hole that runs deep. Enter at your own risk.
But don't throw away your Gore-TEX products! There are lots of ways to reuse and recycle them. Do some research, it's worthwhile.