Default Costco free case ruining Tab screen

Got my Tab Pro 12.2 at Costco and the free case, that came with it, has seemed to have bent the screen enough that it lightened the coloring of one of the corners permanently. Of course Costco did an exchange but wondering if this has happened to anyone else or happen to anyone else with a different case. I know the case that comes with it from Costco is a cheapo but I at least wanted something protecting it. Guess I am now looking for a decent case, one that won't ruin the tabs screen.