The worst rental car experience in my life.

First of all I would like to express how unsatisfied I am with your service,your company and how unprofessional your manager is. I would also like to tell you that the vehicle was delivered to me at 01:30pm when you they supposed to deliver it to me at 9:00 am. When giving me the vehicle I complained about all the visible damages that the vehicle had and even the broken windshield glass (which is a very important safety issue) anyways I took a picture of all the damages And even told the manager, he told me to take pictures and nothing else. The day I returned the car the manager told me that the car had a scratch on the side bumper, I told him it wasn't me and he insisted it was me. Then he had me sign a paper that I had done the bumper little scratch on the left side, (of which he did not give me a copy) and then I returned to take a picture of the car and when I passed my hand it was simply dirty and and I showed it to him and he still insisted that I had to claim my insurance. Now my question is: do you work to get money from insurance? because if the insurance paid them money to repair the vehicles you would not have given me this car with the broken glass, scratches and dents. Also they sent me an e-mail saying that also the door was knocked and that never happened and is not even in the report that the employee have. So why are you blaming me for something that I didn't do? I would appreciate your clarifying all this information because in my opinion there is nothing to claim from you. I don’t have any problem to file the claim with my insurance if it was something that I have done. But you guys seems like your are adding damages and also are exaggerating a scratch that is fixed with simple polishing. The other question is, is the car parked because of that little dirty? How you did not stop it because of all the scratches, dents it had and even the broken glass before you guys rented to me?