From London to Edinburgh

There was only one inspector when returning the car in Edinburgh, causing a wait. The inspection was slow, inefficient, and the staff was unfriendly. Each car took a long time to inspect, even the undercarriage was checked thoroughly. They said I scratched the front wheel and might be charged £160. The car has over ten thousand miles and isn't new. I said I wasn't sure if it was me because the paintwork was fine. He asked if I had taken pictures of the entire car when renting. Seriously, who photographs the chassis, tires, and wheel rims? Will tire wear be charged too? I was there with my two kids, wasting a lot of time and had to contact the rental company. This nitpicky company makes you scared to drive their cars. Even if it's the customer's fault, would you really repair or replace a rim for a minor scratch? This is terrifying. Although I had full insurance, this experience was very unpleasant.