THIS...
Especially if you hire writers who OPENLY hate the character.
Along with fans who hate said character and it appears creative agrees.
However that still falls on creative. Spider-Man is trying its best to not make you chose between Peter or Miles. Peter's derailment is not created by Miles but by management.
Meanwhile Black Panther last 3 books are derailed by writers who don't like him. Yet want to focus on others at T'Challa's expense.
Not always. Because at the end of the day all these folks are different.^^^Doesn't the latter lead to the former?
We have 15 Dr Whos-all of them are different.
No one Doctor dominates over the others-they all still get new material out.
Now bring that to comics-we tend to NOT see that.
It's Highlander and there can only be one nonsense at times.
Heck how many DC characters got ruined or tossed for certain ones? That alienated fans?