Board Thread:Support Requests - Community Management/@comment-2060498-20160711025106/@comment-1251315-20160717150910

If a large portion of the wiki articles have been locked for no reason, you can petition to Wikia Staff to unlock the pages to allow users to contribute. Private wiki's aren't permitted on Wikia, so staff don't permit users to mass lock articles to prevent people from editing the content.

You don't have to be a sysop to help manage the wiki. You could try petitioning for the Content Moderator flag on the wiki, which will give you some additional rights (deletion and undeletion of content (files, templates etc), protecting and unprotecting pages and suppressing redirects, as well as moving files and using rollback) to help with the wiki.

If the bureaucrat of the wiki is not willing to accept feedback, consider starting a new wiki and abandon the bad one. :)