2018 Toyota chr transmission problem

Bought the car used as a certified Toyota. Luckily the warranty covers 100,000 miles for transmissions. Like the others have mentioned, there was a humming/buzzing sound that started at 70k miles after an oil change. I mentioned it to my service guy and he said that mechanics did an overall with my last service and found no problems. I had 2 more oil changes and no one notice anything. I just bought 4new tires and the sound got louder and a newer circular sounding hum started. After reading this forum, I knew it was a transmission issue. And then, at 91k miles, it didn’t go into reverse. Scary. It recovered a few minutes later but that completely confirmed transmission issue. I’m at the dealer now. 3hr of waiting, they confirmed that a bearing went bad on my transmission and they are going to need to get me a rental. $12k repair he said. Again, luckily, I’m under warranty. $50 deductible. I’m very disappointed in this Toyota. I’m not surprised it is no longer in production.