As soon as you don't like the data, attack the source?
I don't know the Y, never been in one, but I have a few friends and family members with P100D, P90D, and 3 models. One close cousin bought their 3 in 2017, despite the closest service center being some distance from their house, on the expectation that "it should never need service".
Let's just say, he has racked up a whole lot of miles and vacation days, spent at the Tesla service center, for various recalls, updates, and build error corrections. He still loves the car, it really is a nice car, but he hates the company. I also see Tesla owners posting about various build issues on their own car, in YouTube and Instagram.
So, when Tesla lands on the least reliable list, it doesn't feel like a big surprise. As a newer company with newer tech and models, I'd be almost surprised if they didn't land somewhere on the list. Likewise for other EV's, of course they're going to have more bugs than legacy models based on powerplants with billions of accumulated miles.