If you are being falsely accused of reasons for leaving your job, it is important to address the situation professionally. You can approach your boss and clarify the misunderstanding, providing evidence if necessary. It is also important to maintain a good relationship with your current employer, as you never know when you may need a reference in the future. However, if the situation does not improve and you have already secured a new job, it may be best to focus on your new opportunity and leave the negative environment behind. Ultimately, it is not your fault for seeking better opportunities and looking out for your financial well-being.