Just because the people of earth declare the 6th seal God’s wrath doesn’t mean God sees it that way. The earth people may be fooled into thinking the 6th seal is Armageddon and then view the antichrist as savior. they may believe the Millennial age has begun not knowing the trumpets and bowls are yet to come.
I’ve heard this argument before by people who try to dispute the fact that Rev. 6 announces the beginning of God’s wrath. Keep in mind that the Bible is the inspired word of God and all of Revelation was shown to John by the Lord or one of His angels. If the Kings of the Earth were mistaken in their assessment, the Bible would say so because it can’t mislead us. Since it doesn’t we can assume that what the Kings of the Earth will say is true.