Lets see what the bible says:
Adam and Eve were blessed when they obeyed God, but the moment they disobeyed and listened to the "other spirit" in the garden that said they didn't really have to obey God, they wouldn't really die and listening to "the other spirit" over God, everything was cursed and they were thrown out of Eden. The devil still uses the same tricks that sadly people believe over God.
Deut 30:15 “See, I have set before you today life and good, death and evil, 16 in that I command you today to love the Lord your God, to walk in His ways, and to keep His commandments, His statutes, and His judgments, that you may live and multiply; and the Lord your God will bless you in the land which you go to possess. 17 But if your heart turns away so that you do not hear, and are drawn away, and worship other gods and serve them, 18 I announce to you today that you shall surely perish; you shall not prolong your days in the land which you cross over the Jordan to go in and possess. 19 I call heaven and earth as witnesses today against you, that I have set before you life and death, blessing and cursing; therefore choose life, that both you and your descendants may live; 20 that you may love the Lord your God, that you may obey His voice, and that you may cling to Him, for He is your life and the length of your days; and that you may dwell in the land which the Lord swore to your fathers, to Abraham, Isaac, and Jacob, to give them.”
God does not change, He says He doesn't yet no one believes Him.
The curse is still there Rom 6:23, while many don't see it yet, they will as Judgement is the last day. We have another option and that is through faith and the help of the Holy Spirit we can obey Him by our cooperation and great love for Jesus. But sadly many still listen to the voice in the garden telling us the opposite of what God said.
God wants to bless us. but He wants His children to trust in Him, even if it doesn't make sense like sacrificing Issac, or keeping the seventh day Sabbath holy, His ways our above our ways and if we place our faith in Him over self, He promises to take care of our needs. I know this first hand when I started keeping the Sabbath at many great sacrifices but God has blessed me ten-fold just as He promises.
Isa 56:2 Blessed is the man who does this,
And the son of man who lays hold on it;
Who keeps from defiling the Sabbath,
Rev 22:14 Blessed are those who do His commandments, that they may have the right to the tree of life, and may enter through the gates into the city.
Without God's blessing we are nothing. And only He can reverse His blessing Num 23:20 man can't despite how hard they try.