Team working can lengthen the process
Sometimes, a task just needs to be done, but because the team member responsible for that task has to get the agreement of the others before going ahead, it can take a long time to get anything done. That one task can then have a knock-on effect on the rest of the team and the project in general and the frustration that this causes can cause arguments. There may also be time wasted, particularly in the initial stages of a team project, because everyone is taking the time to know each other and time is needed to plan who does what.