You should at least let him know how you feel, and what the damage is, and what impact that has on the razors themselves.
See if he at least offers to pay for them...the fact that you explained how to take care of them makes it all the worse, and he should be made aware of that.
Of course, as always, easier said than done.
I feel for you...it's just one of those, shaking the head in bewilderment things....