Admittedly I don't know much about him but how is Wikileaks bad? it has exposed a lot of the countries political & military elite illegal dealings.
Can you cite some proof of that? You feeling a certain way about it does not make it so.
Wikileaks selectively leaking the Panama Papers to protect Russian interests and suddenly not caring about transparency:
https://foreignpolicy.com/2017/08/1...-government-during-u-s-presidential-campaign/
https://www.washingtonpost.com/news...e-russian-authors-say/?utm_term=.8bbe74e163d8
https://www.theguardian.com/news/20...ma-papers-as-an-attempt-to-destabilise-russia
https://twitter.com/wikileaks/status/717458064324964352 (Also some antisemitism here, but I'll come back more to that one later)
Leaked Wikileaks emails proving that Assange did what he did to help Trump win:
https://thinkprogress.org/dump-of-w...on-assanges-conspiracy-theories-324923bf22a3/
https://theintercept.com/2018/02/14/julian-assange-wikileaks-election-clinton-trump/
Wikileaks twitter account posting stuff like Russian-propaganda conspiracy theories about MH17
https://twitter.com/wikileaks/status/492033939142619136?lang=en
Now, unlike the Panama Papers connected to Russian interests, which Wikileaks chose not to leak, Wikileaks was suddenly interested in transparency again when it came to stuff like, say, leaking information regarding rape victims in Saudi Arabia and the identity of gay men:
https://www.theverge.com/2016/8/23/...rsonal-data-exposed-rape-victims-saudi-arabia
https://www.theguardian.com/media/2...ts-sensitive-medical-information-saudi-arabia
https://www.independent.co.uk/news/...udi-arabia-homosexuality-arrest-a7206901.html
https://www.forbes.com/sites/emmawo...sing-tyranny-or-a-tyrant-itself/#1518bdab7034
And the information of every woman voter in Turkey:
https://www.huffpost.com/entry/wikileaks-erdogan-emails_b_11158792
https://www.dailykos.com/stories/20...-of-the-Female-Population-of-Turkey-Last-Week
http://nymag.com/intelligencer/2016...-most-of-turkeys-adult-female-population.html
https://www.wired.com/2016/07/wikileaks-officially-lost-moral-high-ground/
Oh, and there was also those times where Wikileaks posted blatantly anti-Semitic stuff like this:
https://slate.com/news-and-politics...ht-have-meant-by-that-anti-semitic-tweet.html
http://www.timesofisrael.com/wikile..._comment_id=1127039907342378_2005230816189945
The point being, Wikileaks under Assange was a thoroughly terrible organization not interested in transparency in any actual meaningful sense, not giving a damn who they hurt, and based on their selective interest in leaking information, what they do and don't leak, and the type of conspiracy nonsense posted to their Twitter, that they/Assange were very, very, very much connected to Russian interests. And that aside, the damage they did to Turkish and Saudi Arabian citizens with reckless release of information that serves no purpose at all other than to be damaging cannot be defended no matter how one feels about transparency (as it has nothing to do with transparency at all to begin with, as it's not useful to anything other than government interests in those countries and those that would wish to do harm at that information), especially with them giving up any claim to actually care about transparency regardless with their reaction to the Panama Papers.
Wikileaks under Assange was a terrible, terrible organization which was doing way too much harm to way too many people for those kinda reasons and more (as this naturally isn't even touching stuff like the rape accusations against Assange personally), but that stuff is a good starting point.