The love story isn't properly told though for it to be a tragedy, because nothing is resolved. Romeo and Juliet is a tragedy. If Romeo and Juliet was like Naruto, 90% of the story would be about Juliet slowly growing to love some other Capulet who was always there for her as they went through lots of stuff together, and then at the end she just decides to be with Romeo for virtue of the fact that she's not supposed to be with him and this fact somehow overrides all the legitimate development that existed. See, that would be a terrible play. How could it be written properly? By not having her love some other Capulet, just have her love Romeo only. Which is what Shakespeare did. So is Kishimoto just incompetent? No, he ruined his story because people wanted him to do so.
There was no external force stopping Naruto and Sakura from being together to make it a tragedy in-universe. It existed in the form of kitten editors and cancerous fans. It's a meta-tragedy.
Yes, I am fully aware of Romeo and Juliet. I majored in Shakespeare in college. Even wrote a disortation about how things might have changed if Romeo stayed with Rosaline.
Not all tragic love stories are Romeo and Juliet style. I am hoping you are aware that Romeo and Juliet is not the only Tragic love story out there. However, it did get a resolve...it just didn't get resolved in a satisfactory way or the way we wanted it to. The whole "Naruto only saw Sakura as a rivalry game" was the resolution to it. It's not what we liked. It's not well written, but it is a resolution. It was an answer to a question, plus Shakespeare didn't have a fandom saying "You know, Romeo should be with that other girl in the story because Juliet is a kitten to Romeo."
Romeo and Juliet is not Naruto because Romeo and Juliet is actually....well, good and has a deep meaning behind it. It is entertaining and meant to be seen as a stage play.
Although, speaking metphorically, NaruSaku is Romeo and Juliet in that all the characters do die in the end. The Naruto we knew and loved died in 699. So did Sakura. So did Sasuke and several other characters. They all died and were replaced by these....facsimilies of themselves. Even Kishimoto knows this because he has no answer for any of these. They died. Their character died and all we have left is an obsessive fangirl with stockholm syndrome, a horrible father who is a drunk and a workaholic, and we have another father who is so apathetic to everything that I am beginning to doubt that he is even a character at this point. Merely a cardboard cut out of a poor Billie Joe Armstrong mixed with an emo goth Raven who is so upset because his JO arm got blown off. (No, you read this all right. Sasuke makes Raven from DC look like My Little Pony and with less issues.)
Naruto and Sakura might be more intuned with the movie "Before we go" with Chris Evans. A tragic love story of two people who meet, but never stay together OR in an ironic twist, Shakespeare in Love. Two people meet under the same passion, one inspires the other, and yet they can never be together because she is to be wed to someone else. Details change here and there, but I am going for the basic premise.
The Wonder Years ending is a traic love story. Same concept too. Spend YEARS building up this relationship between two characters only to make them only friends in the last 5 minutes of the show with the words. "Well, things just happen that way." To me, this is the only ending that can compete with Naruto on the worst ending ever. The only thing that makes it slightly better is that this is what the director planned all along. He didn't change it for the sake of a fandom.
"There was no external force stopping Naruto and Sakura from being together to make it a tragedy in-universe."
I never said it was a tragedy in-universe. That would require characters to actually acknowledge it in universe as a tragedy.
"For never was a story of more woe. Than this of Juliet and he Romeo."
Actually, there really wasn't anything stopping Romeo and Juliet either. They could have just ran away and left, but they were also hopeful that their marriage would have brought the two families together. They had a bigger motive in mind too. There was really nothing stopping them from just running away and eloping.
"The fearful passage of their death-marked love
And the continuance of their parents' rage,
Which, but their children’s end, naught could remove."
The biggest tragedy in Romeo and Juliet is not the fact of their death, but rather they couldn't change their families opinions of each other. The two families could never put aside their difference for the sake of love and the only ones truly punished are their own parents. "All are punished."
What's stopping Naruto and Sakura being with each other now? The answer...the writer. I think we both know that in reality NH and SS would have gotten divorces by now and moved on, but the writer loves making these characters stagnant and never realize how truly miserable they are.
Like I said, many times in the past....I have seen couples get divorces over less.