Not in the US but bought a second-hand Toyota from a Toyota dealer that I later found out from the service manual was a Hertz rental in its previous life. Its been trouble free for the 8 or so years we've had it (it's now with another family member).

Funny enough, I bought that model because I used to rent it from another company and so I "knew" how the car would be.

So, not saying Hertz is a not a shitty company, but I wouldn't say rental cars aren't a good buy