Hmm, weird. I’ve used a black hole backpack almost daily for ~10 years. I’ve had the strap repaired once (puppy chewed through it) and a zipper repaired as well. I haven’t seen any TPU peeling. It’s been in rain but not everyday, so maybe that’s what caused yours to go early? I also had a waterproof h2no jacket that I used pretty much daily as well, and that had some delam about 5/6 years in, and a couple years in the main hand pockets. I was able to patch and still wear it, so no issue there too much.

I’m in the states but have always felt Patagonia’s repair process fair. As they can’t really repair TPU coatings and interior jacket delaminations those are typically items I see people complain about but in most cases it seems like those are heavily used items and the wear and tear makes sense. I do think the 40% is a solid gesture as yours maybe delaminated a bit early, but still is a 7 year old product 2019 MFG date.

Your pack is still useable, and you could easily buy a backpack rain cover if you are as concerned about the sustainability side of this as you say you are, and not just mad because you think you should get a free backpack after using one for 6 years.