[{"_id":"5d8b987f9f8b9f9c8c8b9f9","targetsList":[{"target":"user","statusList":[{"date":"2018-01-01","type":"OK"},{"date":"2018-01-02","type":"FAILD"}]}]},{"_id":"45b987f9f8b9f9c8c8b9ghh","targetsList":[{"target":"user","statusList":[{"date":"2018-01-01","type":"OK"},{"date":"2018-01-02","type":"OK"}]}]},{"_id":"87b987f9f8b9f9c8c8dfg67","targetsList":[{"target":"admin","statusList":[{"date":"2018-01-01","type":"OK"},{"date":"2018-01-02","type":"OK"}]}]}]

db.collection.aggregate([{"$match":{"targetsList.target":"user","$expr":{"$reduce":{"input":"$targetsList","initialValue":false,"in":{"$or":["$$value",{"$ne":[{"$last":"$$this.statusList.type"},"FAILD"]}]}}}}},{"$count":"noFailedLastCount"}])