driver side rear tire is destroyed. what is problem?
When did you notice it? After driving on highway for 2 hrs?
Replace tire. See if it happens again.
That is the problem.
No. What is problem?
1st thing, we have not seen any pictures of the tire, 2nd thing, we have zero history of the tire and how long it lasted, was it ever rotated, when was the alignment checked, has the vehicle been in a wreck or driven off road or hit a curb or, or, or???
A deflated tire will destroy itself quickly. Even a new tire will shred if driven flat. I bet it was due to a nail.