Nested Aggregation Elasticsearch

Your innermost aggs (the one called tags at the bottom) is misplaced and should be a child element of top_docs.

{
  "aggs": {
    "comments": {
      "nested": {
        "path": "comments"
      },
      "aggs": {
        "red_products": {
          "filter": {
            "not": {
              "terms": {
                "text": [
                  "06melihgokcek",
                  "t.co",
                  "??",
                  "????",
                  "???"
                ]
              }
            }
          },
          "aggs": {
            "top_docs": {
              "terms": {
                "field": "text",
                "size": 50
              },
              "aggs": {                   <---- this was the misplaced aggs
                "tags": {
                  "terms": {
                    "field": "text",
                    "include": ".*avni.*",
                    "exclude": "fuat_.*"
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}