Why is my camera constantly shaking?

here's my script.

public class T$$anonymous$$rdPersonCameraController : MonoBehaviour { [SerializeField] private float _RotationSpeed = 1; public Transform Target, Player; float MouseX, MouseY; [SerializeField] private Camera _AimCamera; [SerializeField] private Camera _MainCamera;

 void Start()
 {
     Cursor.visible = false;
     Cursor.lockState = CursorLockMode.Locked;
     _MainCamera.gameObject.SetActive(true);
     _AimCamera.gameObject.SetActive(false);
 }

 private void LateUpdate()
 {
     CamControl();
 }

 void CamControl()
 {
     MouseX += Input.GetAxis("Mouse X") * _RotationSpeed;
     MouseY -= Input.GetAxis("Mouse Y") * _RotationSpeed;
     MouseY = Mathf.Clamp(MouseY, -23f, 70f);

     transform.LookAt(Target);

     if(Input.GetKey(KeyCode.LeftAlt))
     {
         Target.rotation = Quaternion.Euler(MouseY, MouseX, 0);
     }
     else
     {
         Target.rotation = Quaternion.Euler(MouseY, MouseX, 0);
         Player.rotation = Quaternion.Euler(0, MouseX, 0);
     }   
     if(Input.GetKeyDown(KeyCode.Mouse1))
     {
         _MainCamera.gameObject.SetActive(false);
         _AimCamera.gameObject.SetActive(true);
     }
 }

}