Does Buddhism apply to this formula for Christianity?

In a discussion about suffering with my brother that got heated he said, "Buddhism can't end suffering any more than Christianity or Islam, it's a great sales pitch though. Formula to religion: life is bad, but we can end suffering in some distant end goal that no one can ever actually achieve." I'm a not very well studied or practiced, so I didn't know exactly how to respond and it's shaking my worldview.