Do christians have difficulties interpreting the revelation? ... yes indeedee, you can't find 2 christians to agree upon anything. Some don't even believe it is scripture.
And yet christians forsake the plain and clear prophecies that are given in the open scriptures in favour of interpretations [usually dubious] found in the revelation,
Every single thing the church needs to know concerning the end times right up to and including the Rapture is there in the open and plain scriptures ... after the Rap we don't need anything for we shall be with the Lord.
The church also struggles with chapters in Daniel which concern the Jews after the church is gone and chapters 40 onwards of Ezekiel.
Mebbe [apart from devotional value] the Holy Spirit does not teach it. When the disciples asked Jesus about the setting up of the kingdom in Jerusalem He said that is not for you to know, your job is to bear witness of Me.