[{"_id":ObjectId("5a934e000102030405000000"),"0":{"title":"name","description":"database"},"1":{"title":"name2","description":"database"},"2":{"title":"name3","description":"database"},"3":{"title":"name4","description":"database"},"4":{"title":"name5","description":"database"}}]

db.collection.aggregate([{$match:{$expr:{$ne:[{$filter:{input:{$objectToArray:"$$ROOT"},as:"r",cond:{$regexMatch:{input:"$$r.v.title",regex:"name2"}}}},[]]}}}])