There's so much Hinata love and Sakura hate in the West (I don't know about other regions, so I'm trying to be specific), that it's completely missed that in many ways it seems Kishimoto has set up Hinata to be Sakura's foil. Hinata is extremely priviledged, she has a strong family, a strong prominent clan, has a major Kekkei Genkai, has a Sensei who seemed to focus on her, has had bodyguards throughout her life (including recently as a 16 year old chuunin)...she's a character who has all the advantages of the world, but for the most part doesn't have the drive, the strength, or the courage to work hard and literally take the next step. And even though she's improved, she still lags behind the others. Hinata is the very opposite of Sakura, and not in a good way. Sakura doesn't have a prominent family, she doesn't have a rich family that can provide her with bodyguards, she doens't have a Kekkei Genkai -rather the result of her genetics is that she doesn't have much chakra/has low stamina- her Sensei tends to ignore her unless he thinks she needs to be protected (as if he feels that he's been a 2nd chance to protect Rin, if he can protect Sakura). All she has is the fact that she likes to read, that she's smart, that she's extremely good at memorizing, and she took that one talent and took an active role in bettering herself. She saught Tsunade out, and asked to be an apprentice, she found a way to improve herself, rather than finding excuses to lag.
It's so obvious, it's shocks me that it's completely missed, and that a character as privileged as Hinata is often referred to as an "underdog."
I think you are looking at this through Sakura tinted glasses which is understandable as an NS fan however I think you are grossly overstating some of these points to arrive at your conclusion. What on earth does having bodyguards have to do with growth if anything having a pair of goons follow you around all the time would probably hinder feelings of independence. While being from a privileged family in our world gives people certain benefits I cant really see the benefits of it in the Narutoverse for the purposes of comparison she didn't have better gear or instruction as a shinobi that seems all provided through Konoha's Shinobi training, I suppose she did have specfic training on how to use the Byakugan but that's hardly outlandish. Even if Sakura did seek out Tsunade its not as if she had to fight to be Tsunade's apprectice she just walked in and asked and Tsunade agreed (because she saw potential I'm sure). When Hinata is referenced as an underdog it's usually as the underdog pairing or the underdog when compared to Neji, you need to look at the whole picture for a long time she wasn't even treated that great by her own family despite being the heir I mean they let Neji kick the ever living hell out of her in the Chunin exams. I guess my point in all this is that try and separate your dislike for the NH fandom with the actual character of Hinata because when you look at things objectively instead of trying to make the manga fit your argument you will find that you garner a better understanding of it in general. Remember we give NH a lot of flak for giving the story and Hinata centric tilt through interpretation all the time, lets try and avoid doing the same in an effort raise Sakura over Hinata, the story does that all by itself without our help.