Honesty, when done mindfully, is necessary for many reasons. It allows you to provide valuable feedback that can help your employer improve their workplace, demonstrates professionalism and commitment to improving the company, and can benefit you in the long run by enhancing its reputation. While it may be challenging to provide negative feedback, it is helpful to remember that your feedback can help create positive change and that honesty is always the best policy.
There isn't any excuse for bad behaviour in the workplace, but by staying strong and having a plan, you will be able to cope better until you can change your situation.