2D Player dash towards mouse click position

Hi, I'm trying to create a dash similar to the one used in Katana Zero, in which on clicking the mouse button to attack the player does a slight dash in that direction.

I'm trying to achieve this using AddForce, the code I'm using seems to work but the player seems to move first along the X axis and then up the Y axis towards the mouseclick point. Also, the force added isn't equal at all points, clicking the mouse directly above the player adds a lot more force than when clicking at an angle.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class DashToMouse : MonoBehaviour
6. {
7.     [SerializeField] private float dashSpeed;
8.     [SerializeField] private float startDashTime;
9.  
10.     private float dashTime;
11.  
12.     private Rigidbody2D rd2d;
13.     private Animator anim;
14.  
15.     private Camera cam;
16.  
17.  
18.     // Start is called before the first frame update
19.     void Start()
20.     {
21.         rd2d = GetComponent<Rigidbody2D>();
22.         anim = GetComponent<Animator>();
23.         cam = Camera.main;
24.     }
25.  
26.     private void FixedUpdate()
27.     {
28.         DashToPoint();
29.     }
30.  
31.     protected void DashToPoint()
32.     {
33.         if (Input.GetMouseButtonDown(0))
34.         {
35.             Vector3 mousePos = cam.ScreenToWorldPoint(Input.mousePosition);
36.             mousePos.z = 0;
37.             Vector3 difference = mousePos - transform.position;
38.             difference = difference.normalized;
39.             float angle = Mathf.Atan2(difference.y, difference.x) * Mathf.Rad2Deg;
40.             Vector3 dir = Quaternion.AngleAxis(angle, Vector3.forward) * Vector3.right;
41.  
42.  
43.  
44.             dashTime = startDashTime;
45.             while (dashTime > 0)
46.             {
47.                 anim.SetTrigger("ground up swipe");
48.                 rd2d.AddForce(dir * dashSpeed);
49.                 dashTime = dashTime - Time.deltaTime;
50.             }
51.         }
52.     }
53. }
54.  

This is my code. Any help appreciated! Thanks