This is not from wear. To be honest, I am a 100% sure that it was like that before you bought it.
Natural cowhide usually wrinkles around the edges. This wrinkling has a very distinctive pattern. Yours is exactly like that. Vuitton almost always uses only the smooth middle part of each cowhide. But since this process is automated and done by robots and lasers, mistakes like this can happen. The factory workers should have noticed, but they didn't.
I don't find this acceptable though. This is why we should always examine every detail very carefully upon purchasing. After a month, I understand why they try to defend themselves. And since it looks like wrinkles, they can easily say that you caused them. But as someone who worked with leather, I can assure you that it was like that already when it entered the factory as a piece of leather. You can't even cause wrinkles like that. Even if you've pulled the tab upwards a lot, it would look way differently.
Strangely, this issue is not rare lately. I have seen a Speedy, a Graceful and a nano Speedy on the forum like this just in the past few weeks.