Tire Valve problems of the 2011 Toyota Camry

This complaint is based on multiple replacements and repairs, an abnormally quick/constant loss of tire pressure, and a disastrous blowout that caused me to miss my father's death by 1. 5 hours. I purchased 4 arizonian silver edition plus tires on may 22nd from discount tire. It didn't take long for the tires to lose air. On July 2, one of my tires went flat. On July 5, discount tire replaced the flat tire as well as a second tire. On September 6, I noticed a tire was low again. When I went to discount tire, the employee told me that my air valve was loose, but that they had inflated the tire to its proper pressure level and inspected the other tires as well. On September 12, 2018, I was driving to the denver airport after finding out that my dad was in critical condition in austin, TX. At 12:00 pm mt, when I was driving southbound on the e-470 toll about to exit for denver International airport (exit 28), my rear passenger tire completely blew out. I did not hit anything. I was not speeding nor driving erratically. I was 10 minutes away from the airport. I missed my flight. I had to wait an additional 6 hours to get on the next flight. I arrived in austin at 10:45 pm cst. Upon landing, I discovered that my dad passed away 1. 5 hours earlier. I was deprived of the chance to see my father one last time by a matter of 10 minutes, which was how far I was from the airport when my tire blew out. It's not a hyperbole to say that this situation was the worst experience of my life. But for the blow out, I would've been on time for the 1:55 pm flight and would have made it to see my dad before his death. When I went to discount tire on September 24, 2018 for a tire replacement, I was told by the employees that upon examining the blown-out tire, there was no indicative reason as to why the tire blew out. These tires were defective, causing a catastrophic life event for me.