People who leave their jobs because they find no meaning in what they are doing could save themselves time and effort if they had known who they are. They would have known what they would be doing will not be meaningful and therefore not sustainable.
When what people are doing satisfy their human needs which motivate them to do what they do, they will feel happy and fulfilled. Every day they look forward to do their jobs which they won’t describe as work.
One excellent way to know who you are is to get your Reiss Motivation Profile®️to know and understand what your needs, values and motives. It will be very clear what is it that you do which would make you or not make you happy and fulfilled.