A few months ago I had to remove the rotors. On the front rotors, there is a hex screw that holds the rotor to the hub. Well mine was in bad shape, and ended up getting stripped. I had to have it ready to go the next morning. Used a drill to destroy the screw head and freed the rotor.

I put the wheel back on and figured that as long as the wheel is on, the rotor is not going anywhere. Its held in place by the rim, and has 5 bolts through it.

Drove like this for a while, no problem. After I got 4 new tires, there was a scraping sound. Breaks felt like like they were grinding rocks. I took it apart this morning and looks like my rotor is in bad shape.

Has ridges on both sides, breaks look like that too. Mileage fell considerably too, as it grinds while I drive.

I need a new rotor and breaks, but before I install them... Is it possible that the reason it was destroyed is because I never replaced the hex screw?

I can still extract the screw, but I figure I should know for sure what caused the rotor to get destroyed like that before I replace it.