I used LibreOffice exclusively in college — it was a lifesaver for my broke ass, since most of my money went to beer and hobbies (DnD, home severs, guitars, more drinking…)
It got the job done, but I wasn’t doing a whole lot of writing fwiw. Once I got over the whole “save it using the correct format or your professors will fail you” hump, it was everything I needed and more.
Don’t do any writing that isn’t markdown now, and I write that in Vscode or Obsidian these days.