Why fearful-avoidant attachment is the hardest pattern
Anxious attachment has one direction: toward the partner. Avoidant attachment has one direction: away. Fearful-avoidant oscillates between both, creating unpredictable behavior that confuses everyone involved — including you.
The underlying logic: closeness was both the source of comfort and the source of pain in your formative relationships. Your nervous system learned that the person you need is also the person who might hurt you. So it reaches out and recoils in rapid succession.