My "Smooth Rotation" Jerks around randomly when switching between points.

My character rotation likes to jerk to the right every time it switches points!

What I want is to get my car to constantly move between a set of points smoothly and at a consistent speed. It moves between the points correctly, but the rotation changes to an odd point everytime.

It always rotates a little up and a little to the right every time it switches points. I would like my answer in C# please. While I could probably convert code from Javascript to C#, I hate Javascript, so I never use it. Here is my code:

using UnityEngine; using System.Collections;

 public class ParentMovement : MonoBehaviour {
 
     [SerializeField]
     private Transform[] points;
     [SerializeField]
     private float speed;
     [SerializeField]
     private float rotationSpeed;
 
     private int i = 0;
     
 
     // Update is called once per frame
     void Update ()
     {
         float step = speed * Time.deltaTime;
         if (i < points.Length)
         {
             //Rigidbody GET IT
             Rigidbody rb = GetComponent<Rigidbody>();
             //Move the location to the transform.position.
             transform.position = Vector3.MoveTowards(transform.position, points[i].position, step);
             //Smoothly look to the other object
             Vector3 direction = (points[i].position - transform.position);
             Quaternion lookRotation = Quaternion.LookRotation(direction);
             //Actually LOOK
             transform.rotation = Quaternion.Slerp(transform.rotation, lookRotation, Time.deltaTime * rotationSpeed);
             //Change the points.
             if(transform.position == points[i].position)
             {
                 i++;
             }
         }
     }
 }