Reducing examined:returned ratio when using $text and $search

I’m using Mongo Atlas and I receive quite a few warnings about a high examined:returned ratio. Upon inspection the queries in question are using $text indexes and the $search feature.

See the query below:

{
  "find": "users",
  "filter": {
    "role": "USER",
    "$text": {
      "$search": "someone@gmail.com"
    }
  },
  "sort": {
    "score": {
      "$meta": "textScore"
    }
  },
  "projection": {
    "score": {
      "$meta": "textScore"
    }
  },
  "limit": 20,
  ...
}

Is there a way to fix this high ratio? I have an index for role already and obviously it’s using my text index.

Thanks! Alex