Donezo - and now instead of collapsing comment trees it just removes the content.

// ==UserScript==
// @name         Hexbear Blocker
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Hide tankies on hexbear.net
// @author       YearOfTheCommieDesktop
// @match        https://hexbear.net/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=tampermonkey.net
// @require      https://cdn.jsdelivr.net/gh/CoeJoder/waitForKeyElements.js@v1.2/waitForKeyElements.js
// @grant        none
// ==/UserScript==

function processComment(comment) {
    var link = comment.querySelectorAll('a[title="link"]');
    if (link.length >= 2 && ( link[1].href.includes("hexbear.net") || link[1].href.includes("lemmygrad.ml"))) {
//        comment.querySelector('button[aria-label="Collapse"]').click();
        var content = comment.querySelector('div[class="md-div"]');
        if (content !== null) {
            content.remove();
        }
        //console.log('hid hexer');
    }
    return true;
}

waitForKeyElements('.comment-node', processComment);