How to make a 2d player sprite rotate without messing up movement with C#,

Here is the buggy code. When I apply the conditionals that allow the character to rotate, rotation works just fine. However, up and down cause movement up on the y-axis, while left and right cause movement down on the y-axis. x-axis, or horizontal movement, are impossible. Movement is normal when I comment out the if{}else if{} blocks containing transform.eulerAngles = new Vector3(0, 0, rotation); to disable them, so the conclusion is that eulerAngles are doing something to Vector3. Resetting Vector3 to the Input.GetAxisRaw values does not fix the problem.,So when I use the following C# script on my player, I rotate the character but the movement gets jacked up. This is a 2D Sprite to rotate on the z-axis in relation to it's movement direction. It's set to move at 90 and 45 degree angles so it can turn with corners as well:

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

public class player : MonoBehaviour { private BoxCollider2D boxcollider; private Vector3 moveDelta; private Quaternion rotationDelta;

 // Start is called before the first frame update
 private void Start()
 {
     boxcollider = GetComponent<BoxCollider2D>();
 }

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

     //reset moveDelta
     moveDelta = new Vector3(x, y, 0);

     //Make character move
     transform.Translate(moveDelta * Time.deltaTime);

     //make player rotate with direction
     if (moveDelta.x>0 && moveDelta.y==0)
     {
         transform.eulerAngles = new Vector3(0, 0, 90);
     }
     else if (moveDelta.x<0 && moveDelta.y==0)
     {
         transform.eulerAngles = new Vector3(0, 0, 270);
     }
     else if (moveDelta.y > 0 && moveDelta.x==0)
     {
         transform.eulerAngles = new Vector3(0, 0, 180);
     }
     else if (moveDelta.y < 0 && moveDelta.x==0)
     {
         transform.eulerAngles = new Vector3(0, 0, 360);
     }
     else if (moveDelta.y > 0 && moveDelta.x > 0)
     {
         transform.eulerAngles = new Vector3(0, 0, 135);
     }
     else if (moveDelta.y > 0 && moveDelta.x < 0)
     {
         transform.eulerAngles = new Vector3(0, 0, 225);
     }
     else if (moveDelta.y < 0 && moveDelta.x > 0)
     {
         transform.eulerAngles = new Vector3(0, 0, 45);
     }
     else if (moveDelta.y < 0 && moveDelta.x < 0)
     {
         transform.eulerAngles = new Vector3(0, 0, 315);
     }

     
 }

}