1. On desktop, I clicked through a link on Facebook, leading to an AMP page
2. The page was clearly meant for mobile, and looked bad on desktop; the images were full-screen size, the font was too big, and the text line length went all the way to the edges of my very wide browser window.
3. I used Ctrl+Minus to adjust the zoom, which fixed the font size but not the images or the line length.
4. I looked at the top and bottom of the page for a "desktop site" link, and couldn't find one.
5. I looked at the address bar, and saw that the URL was an AMP URL. This is the first time I have noticed that I am using AMP in more than a month.
6. I closed the tab and went to HN, where this was the top article.
When AMP works well, it's inconspicuous, so it's not so surprising that most of my remembered experiences with it are negative. Still, I think google needs to invest a bit more in preventing this sort of bad experience, because currently it comes across as "google breaking the web".