[{"_id":1,"team":"Arsenal","season":[2018,2020]},{"_id":2,"team":"Arsenal","season":[2017,2018]},{"_id":3,"team":"Arsenal","season":[2020,2021]},{"_id":4,"team":"Arsenal","season":[2018,2019]},{"_id":5,"team":"Arsenal","season":[2019,2020]},]

db.collection.find({team:"Arsenal",$expr:{$eq:[{$size:{$filter:{input:"$season",cond:{$and:[{$gte:["$$this",2018]},{$lte:["$$this",2020]}]}}}},{$size:"$season"}]}})