I have a habit of catching my toe on uneven sidewalks and curbs, etc. I trip a lot. Just call me grace. Lots of my sandals in particular have damage right at the end of the toe. I must not pick up my feet high enough, or maybe I can blame it on my uneven legs (one an inch longer than the other). So I can commiserate even though I have no suggestions.
I have the same boots and have only worn them once so far (I hope they ease up on the next wear, because my feet hurt at the end of the day), but I wonder if a protective spray might be a good idea. I'll probably avoid wearing them in any kind of wet weather.