This autocomplete suggests domains that don't exist. You can just type garbage and it will suggest something, but then if you go there, there are no records.
It seems like one purpose of an autocomplete box is help you avoid typos, so that makes it less useful.
The autocomplete seemed to suggest real domains to me. If you typed in garbage it suggested the garbage plus a bunch of common TLDs - that seems like a reasonable choice to me. In any case, if your issue is the list of domains to suggest, its trivial to change that to a different list.
Yes, OP seems to have completely lost touch with what is actually useful vs optimizing metrics for the sake of it.
But there is a cool blog post about it though.