Common examples of self-sabotaging behaviours include procrastination, perfectionism, negative self-talk, setting unrealistic goals, avoiding responsibilities, or engaging in self-destructive habits like overindulging in unhealthy behaviours or substances. If this is you, then it is to your credit you are being honest with yourself, and that you are wanting to do something about it.
We are always doing something; we engage in both helpful or unhelpful behaviours for a reason. This can include a fear of failure, low self-esteem, self-doubt, or a subconscious resistance to change. Therapy can help you grapple with those reasons, understand them and feel equipped to know how to untie yourself.