I do not understand why it's so hard for you people to get how staff complaints work
You, as a member, submit a staff complaint. You present your case, you present your arguments. Staff complaints are (most of the times) not the same as generic reports, in the sense that there isn't some clear rule breaking going on, it's a matter of "Did this staff member do/act like something he shouldn't have?".
The staff member sees this complaint and is open to propose a counter argument to your case. They debate your points. Of course they will defend themselves. If their superior(s) see that the staff complaint is not legitimate or dumb or whatever, they will also either defend the staff member, or outright close the complaint if there is nothing to discuss. On the other hand, if the superior sees that the staff member indeed is guilty of something that deserved a staff complaint, they will be reprimanded. Their "punishment" ranges from talking to the staff member, getting them to understand that what they did was wrong, telling them to not do stupid stuff like that ever again, all the way to a banfire (even cases like this happen, albeit they are mostly preceded either by multiple staff complaints or a long discussion among the higher staff).
I have had 2 staff complaints written on me that are still available to see (one of them was deleted due to it's, sub-par nature [Groh: This wasn't abandoned in our IRC tho, I still had a talk with Icky/Reta about it])
One came from when I was dealing with a particularly unique case where a member of an organization seemed to want to use that organization to kill the activity of another. In my mind, closing the org until the case has been dealt with, made sense.
Science01, the person who made the org, made a staff complaint on me. Rai, my direct superior in the clan staff branch, saw this complaint, debated with me, showed me that I didn't need to do it that way, handled the report, gave me advice, opened the org.
Second one was from a person who was in one of my ingame events, he complained about me voiding all his points in an EVictory when he left. Problem was, neither side had screenshots.
After Reta butchered me about always taking screenshots of ingame stuff, he promptly closed it, noting the fact that I should have taken screens.
In both these cases, the staff complaint was not overlooked, and in both I got reprimanded for my actions.
Staff complaints is not a shootout between a member with a handgun and a whole staff team loaded with military grade weapons. It's a place where you present your argument and the relevant staff members present their counter argument.
I don't know what you expect out of a staff complaint.
No, a staff member won't be shamed for every action he does wrong.
No, a member won't be threatened to not make complaints under the threat of a ban (if the complaints are legitimate and not just shitposts).
Maybe you expect an apology. Yes, an apology is common decency if it has been proven that the staff member has wronged you, and I have seen staff member apologize if they truly felt like they had to. But forcing people to apologize for every single little thing is not realistic.