Omega assassin of chaos (Percy Jackson fanfic)

The beginning

All rights go to Rick Riordan this is for the whole book.
*Percy's p.o.v*
My stupid half brother with a big ego ruined my life. First he took all my friends. He blamed pranks on me, ruined things that belonged to the campers and blamed that on me. He broke Grover's reed pipes and said I did it. He stole Thalia's bow and put it on my bed. He told Nico that I let his sister die. Worst of all Annabeth cheated on me with him. So I left camp and now I'm commander omega and chaos' personal assassin.

*flash back*
I went to the beach to find Annabeth today is the day I'm going to propose her. I hear two people talking and one sounds like Annabeth and the other sounds like my brother Nathan. I go to check and see if my suspicions were right and they were.

"Annabeth!? How could you?! After all I've done for you this how you repay me? I gave up being a god for you!" I said.
"P-Percy I-I-it's not what it looks like." She said.
"Shut up wimp." Nathan says.
" Have fun with your new boyfriend Annabeth!" I told her as I took out the ring and threw it at her.

I walked back to my cabin and started packing my stuff when Nathan came in.
" Aww how's mr. Lonely? Are you sad because I ruined your life?" He says as he's putting on the song lonely by akon.
I turn around and punch him in the nose. I smiled as I heard a crack and he fell backwards. I picked him up by his shirt and punched him in the face three more times before throwing him against the wall. I grabbed his sword and stabbed it through his shoulder as he was laying unconscious.

" That's for ruining my life punk." I said to him as he started to wake up.
I stomped on the sword and it went deeper into his shoulder. You could here his cries of pain all way at Thalia's pine tree. His best friend Tom came running in and tried to stab me with a dagger so I punched him in the face and threw him next to Nathan.

I quickly ran to half-blood hill and just as I passed the border I was transported to Olympus. " YOU ARE GOING TO BE EXECUTED FOR BEING A SPY FOR GAEA!!" Zeus thundered. " My fatal flaw is loyalty you thick skulled drama queen!" I responded. "ANY LAST WORDS BEFORE I DESTROY YOU?!" He asked.

"Yeah actually I have a couple."

"Then quickly say them so I can destroy you."

" I forgive everyone except Nathan."

"We don't care traitor." He said as he threw his masterbolt at me.
I grabbed it and let it shock me to death.
Everything went black and I fell backwards.

*Appolo's p.o.v.*

A black portal opened up and a hooded figure walked out of it.
"WHO ARE YOU?!" Zeus asked the figure.
"Why I'm chaos creator of everything and you my dramatic grandson killed my son." The figure who was chaos said.

This is my first fan fiction so don't hate.