I saw the term spinning black hole popping up everywhere so my question do spinning black hole behave similarly to say a planet where it bulge in the equatorial and compress at the poles? what fundamental force is causing the bulging because in the case of planet it is the electrostatic force?
The angular momentum of a Kerr or Kerr-Newman black hole causes the event horizon to have an equatorial bulge. It emerges from solving the Einstein field equations for gravity and has nothing to do with any of the other three fundamental forces.
You can picture it as being similar to the bulging of a rotating planet due to centrifugal force.