It angers God when we take His blessings for granted

Psalm 90:7, 9, 11-12

For we are consumed in your anger. We are troubled in your wrath. For all our days have passed away in your wrath. We bring our years to an end as a sigh. Who knows the power of your anger, your wrath according to the fear that is due to you? So teach us to count our days, that we may gain a heart of wisdom.