The Blessing of Listening to Hashem's Commandments

םֶכְתֶא הֶוַּצְמ יִכֹנָא רֶשֲׁא םֶכיֵק˄ֱא 'ה תוְֹצִמ לֶא וּעְמְשִׁתּ רֶשֲׁא הָכָרְבַּה תֶא :םוֹיַּה דברים פי"א פכ"ז

The explanation is, that is exactly the Brochoh. Even though in this world it is a life of struggle, but with this a person acquires Eternal life of Olom Habboh (the world to come). And the curse is, if you will not listen, that is the actual curse, even if it is a life of pleasure. For that itself is a greater curse, since he is being paid such for his Zechusim (merits), and he will sin additionally than if he was living a life of poverty and struggle. The conclusion is that a life of pleasure is a curse to a person.

Sefer Dorash Moshe - Rav Moshe Feinstein ZY"A