Massive pile of garbage is more like it. As a developer, the only thing slowing me down from getting work done was waiting on JIRA and being told to use the crap they call Confluence to document things.
JIRA & Confluence seem to be the best of a bad bunch. I do miss the self-hosted option.
It's worth a look if you're evaluating.
JetBrains Space is another alternative, but I have no experience with it.
Mediawiki is a pain to maintain but nothing else comes close.