Humans have a natural bias towards the negative. In order to survive, like any animal, we need to be aware of risks and danger. Being alert and vigilant to them is part of what has helped us to evolve and thrive.
It can be important to balance this out with not only a sense of what is working, but also with a sense of what is possible. From wherever you are, there are always possibilities. They may initially be small, but as you begin to bring them into being they can grow, and so can your sense of self-esteem, confidence, and perception of what is OK with you and with the world.