Based on the information you provided, there are several factors contributing to the difficulties you are facing in your work. Firstly, the change in management and the increase in team members may have disrupted the dynamics within the department. This can often result in power struggles and a loss of authority for some employees, like yourself. Additionally, your lack of assertiveness and presence may have made it difficult for you to lead and assert your authority effectively. This could be further exacerbated by your colleagues' strong communication skills and ability to project a strong presence, which may have overshadowed your own contributions. Furthermore, it seems that your superiors may not be addressing these issues effectively, as they have not intervened in the situation despite being aware of the problem. This lack of support from your immediate supervisor may have contributed to the ongoing challenges you face. Moreover, there seems to be a lack of clear communication and accountability within the team, which can lead to misunderstandings and complaints. It is important for all team members to trust and support each other in order to foster a productive work environment.To address these challenges and become successful in the workplace, you may consider the following strategies:1. Assertiveness and Presence: Work on improving your assertiveness and presence in the workplace. This can be achieved through professional development courses or seeking advice from mentors or colleagues who have a strong presence.2. Communication and Collaboration: Enhance your communication skills and foster collaboration within the team. Clear communication of expectations and responsibilities can help in better coordination and teamwork.3. Seek Support: Approach your supervisor or HR department to discuss the challenges you are facing. Seek their guidance and support in addressing the dynamics within the team. It is important to have a supportive supervisor who can advocate for you and provide a fair working environment.4. Build Relationships: Focus on building positive relationships with your colleagues. This can help in establishing trust and gaining support from your team members.5. Proactive Approach: Take a proactive approach to your work by anticipating potential challenges and taking steps to address them before they become major issues. This can showcase your competence and dedication to your responsibilities.Remember, becoming successful in the workplace requires a combination of assertiveness, effective communication, and building positive relationships. By implementing these strategies, you can work towards achieving your career goals and becoming a respected professional in your field. Good luck!