Toriyamas reasoning for ending dbz literally has no relevence to the discussion at hand. The idea im trying to present to you is that whether you like the result or not, most popular comic book series, historically speaking, typically have some kind of sequel or retelling. Its going to happen whether you want it to or not. Your love for the original work has no bearing on the quality of the new work. Nor does how good the original story is prevent a sequal from happening. Look at Marvel/DC. They wear the shit out of their IPs. In comparison, a boruto manga is actually rather silly to complain about. If you dont like the idea of it its as simple as not reading it and now spending your hard earned money on the content. If its shall be revealed as such in time, but i consider it wiser to see the idea completely come to fruition before writing it off completely. Such is my mind based on logic though, after all, you are a fairy tail fan(im joking dont get butthurt)
Marvel and DC aren't directly comparable to
Naruto/
Boruto, because they do something very clever to avoid infuriating the fans or to make it appear like they're "milking," even though they are.
By making the creation of different universes "canon," in a sense, they're able to continue doing different things without infuriating the fanbase by giving Approval From God for readers to which stories they want to believe are true and to follow, while also coming out and saying "these stories are definitely fanfic" (ex: What If? stories). So there isn't the same sense of "my series is being destroyed!" Your series ended, and they're just doing another version of it.
With Boruto, and most other manga/anime, this doesn't really happen. The relationship between GT and Super is basically the relationship between Star Wars in regards to pre-Disney and post-Disney canon. They waited a long time until they were ready to milk the series again, and then rendered GT or the Star Wars EU not-canon, which is just disrespectful and obviously geared towards milking. So there's more contempt for the writers there. In the case of Boruto, readers feel that a manga they respected (and that got beaten to hell in War Arc) is being resurrected from the dead to be beaten more, just because the publishers want more milk.
Even though you can choose not to read Boruto, it still remains that a series readers care about is being, from their perspective, abused just so publishers can make more money. If Shueisha came out and said "This is a separate and unrelated series about the adventures of Naruto's kid," there'd probably be less backlash. If Shueisha had announced their intention to make a Boruto manga right away, and was more transparent about the whole thing, there'd probably be less backlash.
Super also gets more of a pass because it's endorsed and made with Toriyama's participation, whereas GT wasn't really, and Toriyama outright disliked creative decisions made in GT. In the case of Boruto, it's perceived that this isn't really happening because Kishimoto wants it to happen as much as it is happening because Shueisha can't really let the series go, and just wants more money at all costs.
I don't mind the Boruto manga; I think it's fine and people who like the series will probably continue to enjoy it; those who are critical will remain critical and I don't see the new mangaka doing anything revolutionary that's going to change their minds. Still, I understand the point of view of people who are butthurt about it.
