The most elders I know are really thinking and trying to do good.
They do have some power in the congregation and as always with power some people have a tendancy to misuse it. That is not different then anywhere else.
Are there any good statistics if things are worse or better?, probably not....
Most of the higher in rank ZO, DO, CO's etc, are the same. They just the same as elders, but mostly even more dumbheaded and singleminded. If you have any own thoughs you never make it much further then elder.
About the GB, I still did not make my mind up if they really believe it themselves or not. I think probably they do. That does not make them innocent or not liable for their actions of course.
I think even that they maybe not even think they are lying. As for the changing dates etc. That is not lying, that is just stupidity etc. (It depends on your definition of lying of course, but that is another topic) They maybe believe it themselves. About the scandals and cover ups. That is withholding information, and maybe just they think of not causing the members to stumple.
Sorry I can't see them as some DR evils 'lets destroy the world' types.
Maybe not much different then the pope
p.s. I do not defend them here, I think they are full responsible for what they preach and do.