I can't speak for anyone else, but the reason I'm harder on them is because they lie about themselves and paint those who actually do tell the truth about them as "liars, opposers and apostates."
For instance...the pedophile issue. If the org would just step up and say, "Yes, we have a problem, but we are going to get it taken care of," but oh, no, instead they say, "it's all lies made up of those who hate us," while at the same time df'ing those who are abused or who try to warn others. Not only do they insist they do nothing wrong, but they cling harder than ever to practices that cause the problem, out of stiff-necked insistence that it doesn't exist! Why? To protect their image and for no other reason.
They howl about "false religion" being associated with the UN, and when it comes out that they were an NGO for years, all of a sudden, they did nothing wrong and anybody who doesn't immediately manufacture false memories to go along with their story is a lying apostate.
When I studied, I was constantly told that all other religions were false because they didn't 'follow the rules,' then, when I saw time and time again, evidence of JWs not 'following the rules'...that was not evidence that JWs were wrong and I'd better keep my mouth shut about it.
Rudeness by Witnesses often gets commented on.
Any misconduct by elders.
Misconduct by JWs.
The difference is...JW propaganda claims that JWs aren't rude, Jehovah's holy spirit directs elders so they don't behave badly, and if an JW does something wrong and doesn't repent he's removed. THe truth is that JWs are almost always rude if they are challenged about their beliefs, elders do behave badly, and misconduct by elders or other JWs is much more likely to be covered up (and any who know about it threatened to silence) than handled.
They're definitely a "kill the messenger" religion, and they deserve every bit of opposition they get. Not because I hate them, but because I will take every opportunity to point out their lies, contradictions, and inconsistencies.