My Transform goes faster diagonal than going straight

Getting Started
,
1 
using UnityEngine;
using UnityEngine.EventSystems;

public class PlayerMovement : MonoBehaviour
{
    bool grounded;
    Vector3 moveDir, sideDir;

    public float desiredHeightAboveGround;
    private Vector3 previousPosition;

    void Start()
    {
       
       
    }

    private void Gravity()
    {
        transform.Translate(0, -.2f, 0);
    }

    private void isGrounded()
    {
        if (Physics.Raycast(transform.position, Vector3.down, 1.7f))
        {
            grounded = true;
        }
        else
        {
            grounded = false;
        }
    }

    private void maintainHeight()
    {
        RaycastHit hit;
        if(Physics.Raycast(transform.position, Vector3.down, out hit, Mathf.Infinity))
        {
            float currentHeightAboveGround = transform.position.y - hit.point.y;
            float heightDifference = desiredHeightAboveGround - currentHeightAboveGround;
            transform.Translate(0, heightDifference, 0);
        }
    }

    public float GetVelocity()
    {
      
        Vector3 velocity = (transform.position - previousPosition) / Time.deltaTime;


        return velocity.magnitude;
    }

    void Update()
    {

        previousPosition = transform.position;
        isGrounded();

        if (grounded == false)
        {
            Gravity();
        }
        else
        {
            maintainHeight();
        }


        moveDir = transform.forward;
        sideDir = transform.right;

        if (Input.GetKey(KeyCode.W))
        {
            transform.Translate(moveDir * .02f);
        }

        if (Input.GetKey(KeyCode.S))
        {
            transform.Translate(-moveDir * .02f);
        }

        if (Input.GetKey(KeyCode.D))
        {
            transform.Translate(sideDir * .02f);
        }

        if (Input.GetKey(KeyCode.A))
        {
            transform.Translate(-sideDir * .02f);
        }

       

        print(Mathf.Round(GetVelocity()));

    }
}

I switched from using rigidbodies to just manipulating the transform directly myself. It’s a bit of a hassle getting the transfrom to recognize it’s on ground, but I managed to do it. One thing I noticed however was that the transform goes a bit faster when traveling diagonal than straight. I’m a little embarrassed to admit it, but I went to ChatGPT for help, but its code didn’t help. Any suggestions on what I can do to fix this?

2 
using UnityEngine;
public class PlayerMovement : MonoBehaviour
{
    void Update()
    {
        if (!Physics.Raycast(transform.position, Vector3.down,1.2f)) // no ground below?
            transform.Translate(0,-0.2f,0); // move downwards
        transform.Translate(new Vector3(Input.GetAxis("Horizontal"),0,Input.GetAxis("Vertical")).normalized*0.02f);  // normalizing the movement vector prevents faster movement in diagonal directions
    }
}
3

If you have a square, the distance from the center to a corner is father than the distance to the middle of one of the edges. Whereas with a circle, the distance from the center to any point along the circumference is always the same.

Right now you’re making a square when you want to make a circle. This is easily done by making a Vector2/3 out of your input and normalizing it, so its magnitude is exactly 1.

For example:

float xInput = Input.GetAxis("Horizontal");
float yInput = Input.GetAxis("Vertical");
Vector3 input = new Vector3(xInput, 0, yInput).normalized; // get the normalized result
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