"Protestants don’t have a Deposit of Faith nor do they have Liturgy (or Liturgical Calendar), so they don’t really have doctrines. They see the Christian faith as something we all individually derive from scratch for ourselves, with each of us deciding what is and is not doctrine. But this is man-made religion, rather than religion delivered to us.
I believe that it might be in your best interest to become better informed concerning Protestants before make claims about them. While not all Protestants follow a Liturgical Calendar or have liturgical worship many do as well as follow the Common Lectionary. All Protestant churches have doctrine which they believe and follow. May I inguire who gave you this Deposit of Faith to you; God or the church? I would suggest that much in the your belief system is man made religion as it is interpreted from sacred scripture by man.