I've actually never seen a HN thread that was overall positive about Theranos. The top comments were shears critical of the company, despite all the worthy surface level virtue it carried.
I believe that this [1] is the oldest thread in HN about Theranos. There are two sub-threads that are negative and one which seems quite spot-on in hindsight. But the top comments are all quite positive.
[1] https://news.ycombinator.com/item?id=6349349