Does a waiver of direct appeal rights and collateral rights excepting claims premised on ineffective assistance of counsel violate a defendant's "due process" rights to a fair hearing when said waiver immunizes the sentencing court from appellate review of a sentence that is clearly unreasonable, unfair and in violation of the prohibition against unwarranted sentencing disparities?

Does an unjustified disparity between sentences imposed on co-defendants violate a defendants rights to equal protection and due process?

Does a waiver of direct appeal rights and collateral rights excepting claims premised on ineffective assistance of counsel violate a defendant's due-process rights to a fair hearing when said waiver immunizes the sentencing court from appellate review of a sentence that is clearly unreasonable, unfair and in violation of the prohibition against unwarranted sentencing-disparities?