It is entirely plausible that "sparrowhater" is a colloquial or misspelled way of saying "the person who hates Sparrow" (referring to the Penny Sparrow case) or searching for updates on her social media status. Given that her online presence was "fixed" (i.e., permanently removed) by the platform years ago, the search for "sparrowhater twitter fixed" likely connects to this historical desire to see justice or accountability served.
If you are searching for how to fix a Twitter account, you probably suspect it has been "shadowbanned," locked, or suspended. Understanding why this happens is the first step to fixing it. sparrowhater twitter fixed