Earning grades or earning money is not the sole purpose for work. You work to earn peace, satisfaction, happiness and wisdom. And you have to work for it. Nothing in life comes for free.
God made our bodies and souls with a purpose. Each part and each feature with a purpose. And we are at peace when we respect it. God made our lives with a plan and we are at peace when we follow it.
You are not the one to decide what you deserve or do not deserve or what someone else deserves or does not deserve. You just do what your heart says and leave the rest to God.
Life is never complicated. It is our ignorance (lack of understanding) that makes us feel that it is complicated. The truth is that it knows only how to be simple.
If you ever get time to glance back in your life, you will find that the things that gave you maximum happiness were very little and simple. It is those little and simple moments that make life big.