Momentum and Inertia for character controller,Momentum and Intertia

So, when my i let go off my keys the controller stops like it $$anonymous$$ts a wall, i tried changing that but all that changed is that now it gets flung into outer space every time i press a key

         float x = Input.GetAxis("Horizontal");
         float z = Input.GetAxis("Vertical");
         Vector3 newMovement = transform.right * x + transform.forward * z;
         momentum = new Vector3(characterController.velocity.x, 0, characterController.velocity.z);
         newMovement.y = 0;
      if (!newMovement.normalized.Equals(momentum.normalized))
             {
                 
                 Debug.Log("new" + newMovement.normalized);
                 Debug.Log(momentum.normalized);
     
                 momentum = (momentum.magnitude - 2f) > 0 ? momentum.normalized * (momentum.magnitude - 2f) : Vector3.zero;
                 
     
                 if (newMovement.x == momentum.x)
                     momentum.x = 0;
     
     
     
                 if (newMovement.z == momentum.z)
                     momentum.z = 0;
     
     
     
                 
             }
             else
                 momentum = Vector3.zero;
             characterController.Move((newMovement * speed + velocity + momentum) * Time.deltaTime);

Also for some reason even though sometimes both vectors are equal they pass through the if statement(i tried using !=)(both vectors are logged on the first 2 lines of the if statement)