No, Jesus doesn't grant your desires just because you ask with a pure heart.

My first wife had two stillborn children before she died when she was 30. Don't you think I prayed for her? Don't you think the whole church prayed for her regularly but the answer was still no?

God gives us trials to make us more like his Son.

(James 1:2-4 NIV) Consider it pure joy, my brothers, whenever you face trials of many kinds, {3} because you know that the testing of your faith develops perseverance. {4} Perseverance must finish its work so that you may be mature and complete, not lacking anything.