Your point that Wikileaks is imperfect is certainly true. But do you know of any perfect institutions?
Assange was intentionally the lightning rod. Within Wikileaks his role is similar to Rumsfeld's in the Bush administration. He takes lots of criticism, personal attacks, etc.
The strategy of those wishing to shut down Wikileaks has been to attempt to vilify Assange. This is to be expected. Yes, Assange should have been more careful about who he slept with, but can you blame him at this point for trying to clear his name and stay out of prison?
The release of the password and some of the other organizational challenges that Wikileaks has faced could be the result of a sloppily run organization, or they could be due to someone on the inside being bought off, etc. To accuse Assange of having the motive of self-aggrandizement (considering that he's the only one who has put himself at risk for assassination, prison, etc.) seems a bit of a knee-jerk reaction.
One thing to consider is that Assange is a poor judge of character -- he misjudged his publishing company, the two female accusers, and probably at least one of the core Wikileaks team members. So yes, Assange has lost a few points... but are you really ready to write him off? This is a guy with exceptionally uncommon courage and will, and he's up against professional intelligence organizations.
Wikileaks has been slowly learning how to do its own proactive PR, how to resist infiltration, etc. We're talking about a very small organization (a startup of sorts) that has had a few growing pains. I think the jury is still out on whether the organization will fizzle out or will continue to gain credibility, integrity, etc.
So far, I think the trend has been that Wikileaks has learned from its mistakes. It has been rather astonishing to me to see the extent to which companies and governments have gone into attack mode against Wikileaks and Assange. For every attack, subterfuge, and machination that has been public there have likely been dozens of others attempted. While these may have succeeded in ways we do not yet know in dealing a death blow to Wikileaks, I think it's too soon to write the organization off. Assange has inspired a lot of people that even in today's world a small number of dedicated people can make large and corrupt organizations very uncomfortable.