[{"_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([{"$match":{"targetsList.target":"user"}},{$unwind:"$targetsList"},{$project:{"targetsList.statusList":{$arrayElemAt:["$targetsList.statusList",-1]},}},{"$match":{"targetsList.statusList.type":{$ne:"FAILD"}}},{$count:"withoutFailedInLastElemCount"}])