The Bible says some people are gifted to preach the gospel and others are gifted for discipleship. I agree the Gospel of Jesus Christ is about Him suffering and dying on the cross. But the rest of the Gospel is that He Rose Again (you left that part off). There is a better day! It didn't end in the tomb!
After receiving the Gospel (the Good News), comes discipleship, a relationship, a walk. That means, yes, I may suffer and need to take up my cross to follow Him, but I also have a new relationship to God, I am an heir and a joint-heir with Jesus Christ. I am adopted by God. I am blessed by God. I am walking with God, talking with God, through Jesus Christ, my best friend. My Heavenly Father WANTS to bless me because I am His child, not because I deserve it, but because of my relationship with Him through His Son, Jesus Christ. He has given me His WORD, a Book loaded with promises!! Both for now and for the future! Prosperity and Blessings are a part of it! Prosperity and blessings are Biblical doctrine - all through the OT and NT. It is just as wrong to accept the Death and Burial of Jesus Christ and leave off the Resurrection and New Life and Blessings as it is to preach ONLY the Blessings and not the Relationship and how we receive that new relationship.
Joyce Meyer does not preach JUST about Prosperity and those of you who say she does have never seriously listened to her teachings and studied the Word with her, you are just going by what her critics have said because she doesn't claim to be Baptist and is not Lifeway's flavor of the month, IMO. Anybody can prooftext the Bible or someone's teachings, BTW.