Mocking it instead of being apathetic may spur someone to try and address its problems. It's worse when management tells people not to complain because it's bad for morale.
I've used and hated other internal tools - stuff like JIRA and Workday - that were just accepted as terrible and never going to improve.
Jira (and bitbucket) have actually improved a lot in the last 2-3 years. Not sure what they did, but it's much snappier now with better uptime than GitHub