Downloaded a .docx template from Hubspot recently, LibreOffice could not even begin to open it correctly, the layout was screwed up all over the place.
Using this template probably saved us 20 hours of work. So the only reasonable solution here was to set up a Windows VM, sign up for Office, and use Word to edit the template.
It's very frustrating when people say things like "those days are long gone" and dismiss issues like this as mere "inconveniences" when they are not and we, while being devoted Linux users, are still facing these challenges.