Purge all your comments from reddit

selfPurge.js

function sleep(ms) {
    return new Promise(resolve => setTimeout(resolve, ms));
}
function clickDeleteFromSelection(selectedNode) {
    for (let childNode of selectedNode.anchorNode.childNodes) {
        if (childNode.innerText == "Delete") {
            childNode.click();
        }
    }
}
function clickDeleteConfirmation() {
    let btnList = Array.from(document.getElementsByTagName("button"));
    for (let btn of btnList) {
        if (btn.innerText == "Delete") {
            btn.click();
            break;
        }
    }
}
let optionDotCollection = document.getElementsByClassName("_38GxRFSqSC-Z2VLi5Xzkjy icon icon-overflow_horizontal");
let optionBtnList = Array.from(optionDotCollection, element => element.parentElement);
let total = optionBtnList.length;
let count = 0;
let isRunning = false;
async function clickAllButtons() {
    isRunning = true;
    for (let optionBtn of optionBtnList) {
        optionBtn.click();
        await sleep(500);
        let selectedNode = document.getSelection();
        clickDeleteFromSelection(selectedNode);
        await sleep(500);
        clickDeleteConfirmation();
        count++;
        console.log(`Deleted ${count} comments...`, `\n${total - count} left...`);
        await sleep(500);
    }
    isRunning = false;
}
clickAllButtons();

selfPurge.ts

function sleep(ms: number) {
    return new Promise(resolve => setTimeout(resolve, ms));
}

function clickDeleteFromSelection(selectedNode: Selection) {
    for (let childNode of selectedNode.anchorNode.childNodes) {
        if (childNode.innerText == "Delete") {
            childNode.click();
        }
    }
}

function clickDeleteConfirmation() {
    let btnList = Array.from(document.getElementsByTagName("button"));
    for (let btn of btnList) {
        if (btn.innerText == "Delete") {
            btn.click();
            break;
        }
    }
}

let optionDotCollection = document.getElementsByClassName("_38GxRFSqSC-Z2VLi5Xzkjy icon icon-overflow_horizontal");

let optionBtnList = Array.from(optionDotCollection, element => element.parentElement);

let total = optionBtnList.length;
let count = 0;
let isRunning = false;

async function clickAllButtons() {
    isRunning = true;
    for (let optionBtn of optionBtnList) {
        optionBtn.click();
        await sleep(500);

        let selectedNode = document.getSelection();
        clickDeleteFromSelection(selectedNode);
        await sleep(500);
        
        clickDeleteConfirmation();        

        count++;
        console.log(`Deleted ${count} comments...`,
        `\n${total - count} left...`);
        await sleep(500);
    }
    isRunning = false;
}

clickAllButtons();

I wrote it in typescript, and then compiled to js.
For some reason it wouldn't work properly in Vivaldi 5.0.2497.24 stable; OS: linux mint 20.1 x86_64.

HOW TO RUN
Navigate to either
[replace YOUR_USER_NAME with...well...your user name]
https://www.reddit.com/user/YOUR_USER_NAME/comments/
or
https://www.reddit.com/user/YOUR_USER_NAME
[More preferably the former]

Then copy code from selfPurge.js and simply run it in the console.

There's another issue; namely, lazy loading. Since all comment/post data won't be loaded; quite reasonably, all comments/posts won't be deleted.
You'll have to scroll down, and call clickAllButtons() again.
Anyways, at least it works (I was able to delete more than 150 comments/posts under 5 minutes) (I think...didn't count).