A disaster. An act of self-sabotage. The work of a sleep-deprived intern. These are some of the verdicts from Atlassian customers who have taken to online forums to vent their frustrations about the $US52 billion software giant’s update to its project management software, Trello.

Trello is a software tool that uses digital post-it notes and whiteboards for teams to keep track of the projects they are working on. Atlassian acquired the company in 2017 for $US425 million and, at the beginning of the year, said it was planning a major revamp of the platform.