1. Galaxy Note 7
The Note sold well and was among the best-selling products for a time until around 2016 when widespread reports from many sources of the phones bursting into flames popped up. One could argue about the many merits of any given phone, but fire is generally not in the top three, or even the top five. In fact, fire is not supposed to be a feature of any phone at all. Samsung recalled them and lost a ton of money, but the damage was done and the Note 7 shall forever be known as a bad smartphone.
2. HTC First
It would be difficult to speculate as to why and how this developed, but it appears someone around the Facebook offices thought users wanted to have a more immersive Facebook experience at the ready 24/7. They developed a mobile home screen experience dedicated to the social media site and had HTC integrate it into what would be colloquially known as the Facebook phone.
It may have been introduced at the wrong time and underdeveloped, but, as popular as Facebook is, nobody wanted it to be involved so intimately in everything they do. It is for good reason we have not seen another attempt from Facebook to dominate our devices.