Both letters of Peter deal with suffering for doing good in Christ’s name. Peter commends suffering for doing good as a great trstimony and condemns suffering for doing evil and being punished for it by authorities.
Is there merit in suffering for doing more than our Lord requires? Sure, among other blessings, it increases our faith as Jesus pointed out in Luke when asked about increasing faith. Mountains into the sea aren’t the result of doing one’s expected duty.
Is there merit
Romans 5:3 says that suffering produces perseverance, which leads to a whole host of other character traits, but there’s NOTHING redemptive in suffering. God is not pleased by it.
It cannot be offered up to Him in hopes that it will get Him to hear us better and answer our prayers sooner. Nor does it impress Him with our ability to endure it.
Yes, there is a lot of bad theology about suffering.