Unity2D not checking conditions properly - unity3d

Question

I've been asking so many Unity questions in such little time and I really appreciate all those who answer. I don't know why I always face such issues for which any of the answers I see on the net aren't able to help me out. Okay so here's my problem:
if (Input.GetKey(KeyCode.Q) && (rightHit.collider != null || leftHit.collider != null) && groundHit.collider == null)
This line of code here in the Update function checks every frame if I'm holding down the Q button on any wall. If the condition is satisfied, then
void Grapple()
{
if (wallGrapple)
{
x = 0f;
rb.gravityScale = 0;
rb.velocity = new Vector2(speed * x, speed * y);
if (Input.GetKeyDown(KeyCode.Space)) { jumpRequest = true; }
}
}
this function is called which allows the player to stick and slide on the wall based on Vertical axis input(which feeds the y variable). Now the problem is that if I only press Q once on a wall then it stays on the wall even though its supposed to be held down for Grapple() to be called [I've used Input.GetKey instead of Input.GetKeyDown] and I am also able to slide above the wall (like there's some sorta invisible wall) even though in the if line, the condition for detecting a wall is being checked.
I've been at it for around 30-45 minutes and I'm unable to crack it. Another workaround I thought of implementing was using a coroutine but I don't know how to use as I haven't found any basic explanation of how it works and how its supposed to be used. Here's the full code,
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.SocialPlatforms;
public class Move : MonoBehaviour
{
[SerializeField] private LayerMask groundMask;
[SerializeField] private LayerMask Wall;
[Header("Horizontal")]
public float x;
float dirX;
public float speed;
float initialSpeed;
[SerializeField] [Range(0, 1)] float LerpConstant;
public float dashForce = 100f;
public bool canDash;
public bool dashRequest;
[Header("Vertical")]
public float y;
public bool canJump;
public bool jumpRequest;
public float initialJumpForce;
public float jumpForce;
public bool canWallJump;
public float modifiedJumpForce;
public float sideJumpForce;
public bool wallGrapple;
[Header("Other")]
public Rigidbody2D rb;
public float gScale = 10f;
BoxCollider2D boxcollider;
RaycastHit2D groundHit;
RaycastHit2D leftHit;
RaycastHit2D rightHit;
// Start is called before the first frame update
void Start()
{
rb = gameObject.GetComponent<Rigidbody2D>();
boxcollider = gameObject.GetComponent<BoxCollider2D>();
jumpForce = initialJumpForce;
initialSpeed = speed;
rb.gravityScale = gScale;
}
// Update is called once per frame
void Update()
{
//Instant 1, 0, -1 inputs
x = Input.GetAxisRaw("Horizontal");
y = Input.GetAxisRaw("Vertical");
if(x < 0)
{ dirX = -1; }
else if(x > 0)
{ dirX = 1; }
if (Input.GetKeyDown(KeyCode.Space) && (canJump || canWallJump)) //for jumps
{ jumpRequest = true; }
if (Input.GetKey(KeyCode.Q) && (rightHit.collider != null || leftHit.collider != null) && groundHit.collider == null) //for wall grappling
{ wallGrapple = true; }
if (Input.GetKeyDown(KeyCode.LeftShift) && (canDash)) //for dashing
{ dashRequest = true; }
Detection();
JumpDash();
Grapple();
}
void FixedUpdate()
{
Movement();
}
void Detection()
{
groundHit = Physics2D.BoxCast(boxcollider.bounds.center, boxcollider.bounds.size, 0f, Vector2.down, 0.1f, groundMask);
if (groundHit.collider != null) //If player is on ground
{
canJump = true;
canWallJump = false;
canDash = false;
jumpForce = initialJumpForce;
sideJumpForce = 0;
LerpConstant = 0.25f;
}
else if (groundHit.collider == null)//not on ground
{
LerpConstant = 0.12f;
canJump = false;
}
//Wall detection
//Left wall
leftHit = Physics2D.BoxCast(boxcollider.bounds.center, boxcollider.bounds.size, 0f, Vector2.left, 0.1f, Wall);
if (leftHit.collider != null && groundHit.collider == null) //if player on left wall and not on ground
{
canWallJump = true;
jumpForce = modifiedJumpForce;
sideJumpForce = jumpForce;
}
//Right wall
rightHit = Physics2D.BoxCast(boxcollider.bounds.center, boxcollider.bounds.size, 0f, Vector2.right, 0.1f, Wall);
if (rightHit.collider != null && groundHit.collider == null) //if player on right wall and not on ground
{
canWallJump = true;
jumpForce = modifiedJumpForce;
sideJumpForce = -jumpForce; // negative of jump force to jump in left direction
}
if (rightHit.collider == null && leftHit.collider == null) //if both walls are not detected
{
canWallJump = false;
}
}
void Movement()
{
Vector2 move = new Vector2(x * speed, rb.velocity.y);
rb.velocity = Vector2.Lerp(rb.velocity, move, LerpConstant);
}
void JumpDash()
{
//Jump
if (jumpRequest)
{
wallGrapple = false;
rb.gravityScale = gScale;
rb.AddForce(new Vector2(sideJumpForce * 2.1f, jumpForce), ForceMode2D.Impulse);
speed = initialSpeed;
jumpRequest = false; //setting jumpRequest to false after jumping to prevent unlimited jumps
canDash = true;
}
/*if (dashRequest)
{
rb.velocity = Vector2.zero;
rb.AddForce((dashForce, 0f), ForceMode2D.Impulse);
}*/ //remember to put this code in later
}
void Grapple()
{
if (wallGrapple)
{
x = 0f;
rb.gravityScale = 0;
rb.velocity = new Vector2(speed * x, speed * y);
if (Input.GetKeyDown(KeyCode.Space)) { jumpRequest = true; }
}
}
}
P.S. I originally wanted to use Space itself instead of Q for the stick and slide but more errors pop up like inconsistent wall jumping so that's why I used Q.
https://streamable.com/3v6qrq <- Video showing the problem.

Answer 1

It seems you haven't set
wallGrapple = false
anywhere in your code except in the jump request. Therefore, as it never gets set to false your player will continuously grapple.
Maybe you can set it to false in the Update function first and do the key detection.

Answer 2

I'm showing you a coroutine example code snippet.
You can understand it from the comment lines and apply it to your own code.
void Start()
{
StartCoroutine("coroutineFunc"); // calling for example
}
and coroutine func like this:
IEnumerator coroutineFunc()
{
// before waiting... if u wanna try something
yield return new WaitForSeconds(1); // waiting..
// after waiting something what do you want
}