Need help with camera in top down shooter

Hi, I have a problem with my camera in my top down shooter, i have a script, and it works, but it only does it when the player is NOT the parent of the camera. The problem is that now that i'm workin on a multiplayer system, the camera spawn as a child of the player, and it keeps rotating, so can someone pls convert this script in a better one(or maybe give me a new 100% working script)?? Sorry for the bad English(if it is), and here is the script: public class Camera1 : MonoBehaviour {

     public GameObject camera;
 
 
     private void Update()
     {
         Plane playerPlane = new Plane(Vector3.up, transform.position);
         Ray ray = UnityEngine.Camera.main.ScreenPointToRay(Input.mousePosition);
         float hitDist = 0.0f;
 
 
         if(playerPlane.Raycast(ray, out hitDist))
         {
             Vector3 targetPoint = ray.GetPoint(hitDist);
             Quaternion targetRotation = Quaternion.LookRotation(targetPoint - transform.position);
             targetRotation.x = 0;
             targetRotation.z = 0;
             transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, 7f * Time.deltaTime);
         }
     }
 }