What is the ruling on an angry person saying to someone who does not pray, "Allah is self-sufficient without your prayer"? And what is the ruling on someone distressed by a prolonged affliction saying, "I don't know what I did to deserve all of this"?

The phrase "God is in no need of your prayers" is correct, but its context might suggest a kind of arrogance or despair. As for the phrase "I don't know what I did for all of this to happen to me," it contains an impermissible objection to divine decree, as one should be content with God's judgment. Scholars have explained that calamities have four stages: discontent (which is a forbidden act of the heart, speech, or action), patience, contentment, and gratitude.