Question EMERGENCY HELP!!!!

Hi Everyone! Im a beginner at Unity and C#. Ive wrote this script from a tutorial. To make a cube move in all 4 directions. if you put this script on a cube it will work. I just dont understand why :
transform.eulerAngles + (Vector3.right * rotFactor) :
transform.eulerAngles + (Vector3.left * rotFactor);
isnt working? the cube moves fine but the rotation is all messed up, if you put a material on it. Vector3.up and Vector3.down are working if i replace right and left but this just doesnt work. please help

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{
public float inputThreshold = 0.2f;
public float duration = 0.3f;
public float rotFactor = 90f;

bool isRolling = false;
float scale;

// Start is called before the first frame update
void Start()
{
scale = transform.localScale.x / 2;
transform.eulerAngles = Vector3.zero;
}

// Update is called once per frame
void Update()
{
float x = Input.GetAxis("Horizontal");
float y = Input.GetAxis("Vertical");

if (!isRolling && ((x > inputThreshold || x < -inputThreshold) || (y > inputThreshold || y < -inputThreshold)))
{
isRolling = true;
StartCoroutine(RollingCube(x, y));
}


}

IEnumerator RollingCube(float x, float y)
{
float elapsed = 0.0f;

Vector3 point = Vector3.zero;
Vector3 axis = Vector3.zero;
float angle = 0.0f;

Vector3 direction = Vector3.zero;

Vector3 rotation = Vector3.zero;

if (x != 0)
{
axis = Vector3.forward;
point = x > 0 ?
transform.position + (Vector3.right * scale) :
transform.position + (Vector3.left * scale);
angle = x > 0 ? -90 : 90;
direction = x > 0 ? Vector3.right : Vector3.left;
rotation = x > 0 ?
transform.eulerAngles + (Vector3.forward * -rotFactor) :
transform.eulerAngles + (Vector3.back * -rotFactor);
}
else if (y != 0)
{
axis = Vector3.right;
point = y > 0 ?
transform.position + (Vector3.forward * scale) :
transform.position + (Vector3.back * scale);
angle = y > 0 ? 90 : -90;
direction = y > 0 ? Vector3.forward : Vector3.back;
rotation = y > 0 ?
transform.eulerAngles + (Vector3.right * rotFactor) :
transform.eulerAngles + (Vector3.left * rotFactor);
}

point += new Vector3(0, -scale, 0);



Vector3 adjustPos = point + direction * scale - new Vector3(0f, -0.5f, 0f);
while(elapsed < duration)
{
elapsed += Time.deltaTime;

transform.RotateAround(point, axis, angle / duration * Time.deltaTime);

yield return null;
}

transform.position = adjustPos;
transform.eulerAngles = rotation;


isRolling = false;
}
}