Copy/paste into the chrome console to make a google doc's comments wider (F12 --> Console Tab --> copy/paste the below code & press enter).

tweak-gdoc-comment-width.js

// This script makes Chrome display Google Doc comments in a wider box (only for while you view the doc).
//  1) Open the google doc in Chrome
//  2) Press F12 (the developer tools should open)
//  3) Click the "Console" tab
//  4) Copy/Paste this code into the console and press "enter" to run it
//  5) Press "X" to close the developer tools
//
//  To go back to normal size, refresh the page.
(() => {
  const newCommentColumnWidth = 500; // TWEAK THIS
  const moveCommentColumnLeft = 200; // AND THIS to suit your screen size and personal preferences
  const style = document.createElement('style');
  style.innerHTML=`.docos-anchoreddocoview-internal {width: ${newCommentColumnWidth}px; position: relative; left: -${moveCommentColumnLeft}px; relative;  padding-left: 10px; background-color: #FFF;}`;
  document.head.appendChild(style)
  console.log('comment style updated')
})()