Underrated is a person who is rated wrongly too low. Underdog is a person who has a low chance of success. The low chance is not necessarily wrong. In sports, an inferior team can beat a superior team. It's called upset. It doesn't mean the winner is rated wrongly. It just means that they beat the odds.
That is why people should watch the doc, it is a surprise, not going to spoiler it. The content is not about where he ended up being. I think in the beginning, Reggie Miller was reading the scouting report about him and it was not good. Thus where the name came from.
Just watched it and I thought as a documentary it was not that good. I think some stylistic choices, shots of people watching footage and long scenes of faces to capture emotion, which was not helped by showing them more than once and given Curry not being a really emotive guy it fell flat to me. Some other choices like blowing past the whole pre-draft process, where he ended up - based on documentary I really don't know - and what was expected of him was just odd. Similar with turning the ankle problems into a 2-minute reel, nothing about the Monta Ellis with and versus Curry narrative that was quite present and important to tell that part of his early struggles did not help. Lastly, and maybe it's just me, but I felt they made it appear like his college footage was older and dramatized for effect, which did not work for me, with pausing and showing this blank 80s/90s TV screen in between. If it had a narrator and a strong voice in those moments, maybe it wouldn't have bothered me as much. I actually really wanted to know more about Curry, his early days, traveling with his dad, being around NBA players, hearing from them and getting more of an idea what he's like as a person, which I really feel we do not get from him. He's quite reserved so this documentary failed in that regard, on top of not really conveying he was underrated past his college days. That part was actually very well done with including his coach and former teammates. With the paper clippings and some commentary, but even there I would've liked to hear what they were saying nationally. The underrated part basically came from him being a bit small, not being recruited and going to Davidson, but since he could always shoot, in the NBA I did not get the idea he was underrated from the documentary. Even though he definitely was. So not covering that part at all, not mentioning he hadn't won the Finals MVP to sell that moment where he finally got it, how people talked about his regular season MVPs, besides the whole draft and his early days was an odd choice to focus so little on or even omit. In conclusion, whoever made the decision what to show and not to show and how to tell the story in my opinion really did not do a great job here. Also considering how long this was, they could've told the whole story. In choosing not to do so, I feel it didn't do Curry's journey justice, him being Underrated justice and failed to convey the message.