Trying To Free Rotate Camera Around A Point

Hello, I am trying the make the camera rotate around a point. The "Yaw Controls" works horizontally and the "Pitch Controls" works vertically. But if I try use them both at the same time, to free rotate around a point, the camera starts going crooked.

    Vector3 pos = RTSControl.transform.position;
 
    if (Input.GetMouseButton(1))
     {
         float yaw = Input.GetAxis("Mouse X");
         float pitch = Input.GetAxis("Mouse Y");
 
         //Yaw Controls
         RTSControl.transform.RotateAround(pos, Vector3.up, yaw * 200 * Time.deltaTime);
 
         //Pitch Controls
         if (pitch < 0)
         {
             RTSControl.transform.RotateAround(pos, new Vector3(1, 0, -1), -pitch * 200 * Time.deltaTime);
         }
         if (pitch > 0)
         {
             RTSControl.transform.RotateAround(pos, new Vector3(-1, 0, 1), pitch * 200 * Time.deltaTime);
         }
 
         return;
     }

I think this could be solved by changing the axis value of the pitch controls, but I'm not sure how to do it. I would really appreciate some help with this.