For those who know what they’re looking for, and how to type… here’s how to block the dumb auto-suggestions from appearing on the Google Scholar search-box:
1. In the UBlock Origin Web browser addon, open the My Filters list (Go: Icon | Slider Controls Icon | My filters tab).
2. Paste in the line…
3. Save the List and exit it. Reload Google Scholar, and the flickery and distracting (and almost always very wrong) drop-down suggestions are gone.
A variant of the above ‘block line’ with probably also work in similarly advanced ad-blocker addons.