<human>: Can you give me a shortened version of the text?

My Mom always compares me to my brother. 
I'm the smart science boy and he's the unemployed 30 year old. I get good grades of mostly A's and 2 B's. My Mom said you're the only hope for this family for a good future life .
Things changed as i had a chemistry exam and i thought 
It was 10th of june. Turns out it was 8th june (today)
I quickly went to school and was on time to finish the exam, it was easy but my mom kept shouting when I came home  saying how irresponsible i was.
Tbh of course I'm wrong 100% but then things got tense....
I am now the "disgrace" of this family.My mom won't even look at me and Everytime i come 5 feet of her she talks about how I'm a loser, won't go to a respected college nor get employed. 
I already have trouble in having confidence in myself and this just blew the rest of my confidence away. Even my own mom lost confidence in me and the stare of disappointment is too much to bear.
<bot>: almost missed an important exam and now my mom hates me and I'm a disgrace to her. She said alot of things and now I've completely lost confidence.