Complaint is a form of attention
It has become common to treat a fan base's frustration as a public relations problem to be managed rather than a signal to be read, and I think that gets the relationship backward. Nobody spends an evening arguing about a rotation decision for a team they do not care about. The energy required to be angry about a specific substitution pattern is, itself, evidence of exactly the kind of attention a franchise should want from the people who support it.
Compare that to genuine indifference, which does not produce heated arguments. It produces empty seats and silence, and silence is a far worse signal for an organization than a fan base that is loudly unhappy about something specific and correctable.
The demanding fan base is often right to demand
Fan bases known for being difficult to satisfy are frequently also fan bases with a long, informed institutional memory of what a well-run team looks like, and their standards, while uncomfortable for the organizations that have to meet them, are usually not irrational. A front office that dismisses persistent criticism as mere noise risks missing the pattern underneath specific complaints, which often converge on real structural problems long before those problems become undeniable.
I am not arguing every complaint is correct — plenty are reactive, unfair to a single bad night, or aimed at the wrong target. But the habit of dismissing criticism wholesale because it is loud is lazier than the habit of actually reading it for what is useful.
What I actually want from a fan base
Given the choice between a fan base that argues passionately and one that shows up politely and says little, I would take the argument every time, because it means the team still matters enough to be worth the trouble. A league that optimized entirely for pleasant, low-friction fandom would be optimizing away the exact texture that makes sport worth following in the first place.
So when the timeline fills up with complaints about a coaching decision the morning after a loss, I read that less as a crisis for the team and more as proof that the crowd is still watching closely enough to be worth the effort of getting it right.