However, it seems like Wikileaks, while claiming to be a neutral source that "just wants to make powerful people accountable", they only seem to be releasing damaging information about systems in place in the US.
I think the issue here is that many (most?) of us assume that all global powers have this capability, yet a Wikileaks is trying to paint the US as the scary one, and so people are questioning their motives. Is what the US is doing morally wrong on a few levels? Undoubtedly. Can the US afford to stop doing these things when some arguably less moral actors are going to continue regardless? That is up for debate.
Assange to me seems irrationally anti-America. Has the US done many reprehensible things now and in the past? Absolutely. But that is true for every powerful nation ever. And if you're looking at America's competition, you'd need to be blind to think that Russia is somehow more benevolent than the US.