New Car Negotiations Skills

The time had come in my life where I was buying my first car and yes I had to wait 30years but the day had come. Came down to a red midsize SUV, negations were going well with the salesperson. I was doing the final paperwork with the checkout person and on the last couple questions he asked if I wanted accidental stain coverage on the leather seats, I declined. Then asked for accidental free flat repair, I declined. I was thinking this is a brand new car, who needs these expensive unnecessary fees? Called car insurance agent to tell him I had a new car. He asked if I wanted full replacement on a new car for the first 6 mos. Ha, I don't have accidents, I declined. Signed the final paper and off to the car they escorted me. I was so excited as I slid onto the new leather car seats. Just as my ass hits the seat my wife let out a deafening scream. Too late, my ink stained pants touched the car seat. Apparently I put their pen in my pocket and it had exploded unbeknownst to me, trickery on their part. First think the salesperson said was not that is a shame but “Should have gotten our accidental protection policy.” Next day I was driving down a city street when the low tire pressure light came on, wft???? Pulled over to see how low a tire needs to be to trigger a light. It was rim on pavement low. Called the sales person and the first thing she said was “should have gotten our accidental tire repair warranty” As I was standing in the dark cold raining in my workout garb I was thinking of something else to say to them other than “ya maybe I should have”. Five days later in a snow storm I was rear ended taking out the back of the car. Within a week of my first brand new car, I had stained seats, flat tire and major damage to the car body. Check please, sigh