Failures happen. I've had to deal with Asus RMA only once in over a decade (I still have a monitor from 2009 that works and is in use). The only "horror" that happened was caused by FedEx, not Asus. I'm definitely upset that I had to send it back to Asus for a second time, but I don't blame Asus for FedEx damaging my device in transit.
I've had more "horror" from Corsair products. And not just one product line from them.