It can be a really difficult situation to be in when you really don't get on with a colleague, especially if they have a track record of "bullying" and "harassing" people who you respect.
If they don't get any repercussions too, it can be seriously demotivating, especially when you're turning up each day and just trying your best.
But one employee got the perfect revenge on their "miserable b****" colleague when they received horrendous messages from the woman where she unleashed a stream of insults on the unsuspecting colleague via Slack when they wouldn't do exactly what she wanted them to do.