Jumping with convex ground

I'm trying to make my 2D player jump. Currently, I'm casting a ray ALONG the bottom of my rectangle player (only way I could find out by myself to stop a problem where if I casted a single ray down the centre, the player could only jump is more than half of their body was on the ground/platform)

The main problem I have now is that it doesn't really like the convex shapes that can litter my game. I'm using an asset called Unity sprite cutter which allows me to cut a 2D shape in anyway. If I try to jump onto a part that I've cut into a wedge shape, it can cause my character to either go incredibly high or not be able to jump at all. Anyone know how I can fix this?

My current player control code:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class CharacterMovement : MonoBehaviour {
     public Rigidbody2D rBody;
     [Range(1, 10)]
     public int Speed;
     private float lastDistance;
     public bool isGrounded = true;
     private LayerMask environment;
     void Start () {
         environment = LayerMask.GetMask("Environment");
     }
     void FixedUpdate() {
         // Check if the user is attempting to jump
         if (Input.GetKey(KeyCode.A)) {
             rBody.velocity = new Vector2(-Speed, rBody.velocity.y);
         }
         if (Input.GetKey(KeyCode.D)) {
             rBody.velocity = new Vector2(Speed, rBody.velocity.y);
         }
         if (Input.GetKey(KeyCode.Space)) {
             RaycastHit2D hit2D = Physics2D.Raycast(rBody.position+new Vector2(0,-1.5f), Vector2.right,1f,environment);
             if (hit2D) {
                 if (hit2D.distance < lastDistance) {
                     lastDistance = hit2D.distance;
                 }
                 else {
                     lastDistance = 100f;
                     rBody.AddForce(new Vector2(0, 10), ForceMode2D.Impulse);
                 }
             }
         }
     }
 }