You are who you are. How other people think about you is merely reflection of your own behavior. True that there are biased people out there, but majority of people are decent and fair. So don't blame others for your own fault. Instead, focus your energy on how to improve and control your own life. For example, if you don't like planning your own life, how do you expect other people to leave the responsibility of planning of a important project to you? If your goal is to live a relaxed, spontaneous life, maybe you are not qualified to be a project manager, whose main responsibility is discipline and planning.
If you really want to get into that role, first try to get organized in your own life. Make clear goals and plans for your own career and stick to it.