בשעת שיש מצה ומרור מונחים לפניך

In all places where Matzah and Marror are mentioned, Matzah is always mentioned first. However, Marror is a sign of servitude (that the Egyptians embittered their lives). Whereas, Matzah is a sign of the period of Redemption, which occurred after the enslavement. Why is Matzah mentioned first?

This can be explained that HaShem wished to shorten the time of the Exile. He accomplished this goal by intensifying the bitterness of the slavery. Thus, the concept of the Redemption (expressed by Matzah) actually preceded the embitterment of the slavery.