At their price point, I really would expect them to last longer.
Indeed. Them are some pricey boulder holders. 6-12 months and 20 wearings does not at all seem acceptable.

My sports bras usually hold up for a few years. I think I got the last group about 3 years ago, and they're doing well. I have a couple of MCs and a couple of Champions, but none of them have underwire. Perhaps that's the difference.