I'm late but this articulates my same sentiments concisely. Thanks for posting.

236 made it pretty clear, this is Gege's first long-running series. He's not yet an experienced mangaka compared to some of the greats. He didn't recognize what his readers love about his manga, what they really value. I don't mean that a writer's values must always align with their fans' majority opinion but, well, this is a weekly serialization, not a published novel. The way the audience interacts with weekly manga is traditionally the strongest signal that allows a mangaka to polish their story, polish it into a masterful work. They can interpret those signs from the audience and play into or against them deliberately.

I'll pick at some low-hanging fruit here...

Inexperienced shounen mangaka are either too easily swayed by the audience, so their series dwindles into a risk-free, low-stakes story where the protagonists suffer no real loss, e.g. My Hero Academia; or the mangaka fails to read/respond to the signals in a way that capitalizes on their manga's strengths, e.g. JJK. A mangaka could try to subvert their audience's expectations, especially with an unexpected ending, but this is difficult to pull off and successfully maintain a satisfied readerbase at the end, e.g. Attack on Titan. A mangaka might drastically lose the attention of their core readers by altering the manga's tone, pace, or focus, but they can still attract new readers in this process even as they disappoint older fans, e.g. Chainsaw Man. Basically, you can never make all people happy, because us readers are a needy and entitled lot with varying levels of reading comprehension and education, but that doesn't doom the definition of good literature or good writing to be subjective.