It is very often that we complain about tribulations and suffering. It comes from sheer disappointment of not being as much as we'd want to be or preventing us from doing something we'd want to do.
The complaint to God is heard, but does it change His Will? Probably not.
Read a few passages on suffering from Saint Faustina's diary. She is one who suffered immeasurably. Her goal was to do God's Will, even if it meant intense suffering. Saint Faustina saw promise in suffering and took others' suffering upon herself.
She also knew that offering her suffering was a gift back to God and would include His Divine Protection.
Pray to Saint Faustina to intercede for us in the midst of great suffering in our lives. She certainly understands the cross and helps carry it for us.
She writes in March 1937:
I suffer great pain at the sight of the sufferings of others. All these sufferings are
reflected in my heart. I carry their torments in my heart so that it even wears me out
physically. I would like all pains to fall upon me so as to bring relief to my neighbor.
Amid terrible torments, I fix my eyes on You, my God, and though a storm is gathering
over my head, I know that the sun is not extinguished. Nor do I wonder at the
deceitfulness of creatures, but I accept in advance whatever may happen. My lips are
silent, while my ears are satiated with derision. I strive for silence in my heart amidst the
greatest sufferings, and I protect myself against all attacks with the shield of Your Name. (Diary entries 1039 and 1040)
