God does not give us more than we can handle. This is true. Yet, there is no scripture where God promises this. Sometimes, He lets us go to the point where we cannot take to prove to Him that we can and that we will.
Consider it pure joy, my brothers and sisters, whenever you face trials of many kinds, because you know that the testing of your faith produces perseverance. James 1:2-3 NIV
The testing of our Faith produces patience and perseverance. It is to see if we truly rely on Him in our struggles. He says to consider our struggles a true joy.
That can be hard for some to grasp. Many Christians have struggled. The Apostles struggled. Most importantly, Jesus struggled. When we overcome these struggles through Jesus, we gain wisdom.
Let perseverance finish its work so that you may be mature and complete, not lacking anything. James 1:4 NIV