Bests & Worsts Reviews from Amazon

I have a pair of these I purchased a year ago from a sporting goods store. They proved to be very durable and comfortable but a bit on the small side. In those I had hiked well over 400 miles and perhaps worn 50% off the tread. Other than them being a bit small, fit and construction was stellar. I relegated them to the sports closet for summer time wear with thinner socks. Meanwhile, in late December 2018, I purchased a pair 1/2 size larger. The construction, fit and comfort was on par with the previous pair. Sadly. Very sadly, the durability was not. Seriously what happened!? I have 7 weeks of usage and maybe 100 miles on these! The treads are ripping off and over 50% of the tread wear life is gone. How can that be??? Merrell, what happened? I no longer feel trust in your product(s) nor can I afford to purchase boots every 3 months if I was so inclined. These say Vibram soles but are totally and completely without the legendary Vibram durability. Update; I attempted to contact Merrell but received no response. A temporary solution to lug and sole separation is to re-attach using superglue. I'll do that for awhile to attempt to get my money's worth out of the purchase but will no longer buy any Merrell product.