My crotch always gets blown out too, it's pretty frustrating. I think it's because I often squat or sit weirdly in my chair and that puts a lot of stress on the area. Where can I buy ultra-triple-reinforced-crotch jeans that can put up with my fidgety lifestyle?

On the recycling front, my local grocery does denim drives where they take the denim and reprocess it into insulation. If you can't find a local program like that and you're not squeamish about who exactly is running the drive, some major clothing retailers participate in similar programs. Personally, the most important thing is the reuse itself, so even if it's some shitass company like H&M and they can offset their taxes a few bucks or whatever, I'd prefer that to landfilling, and I'm pretty sure it's the same organization doing the actual recycling bit regardless of who's collecting the denim.

For the pairs that might be worth salvaging, you can always pay someone to fix them (budget permitting). I've done that with a few of my favorite pairs—just brought them to the dry cleaners and had them mended. For more extensive damage, this probably doesn't make strict financial sense, unfortunately. The disincentive to repair rather than landfill is one of the many negative externalities of cheap consumer goods.