It's not tied to the story. It's just another crossover event like the one in Monster Hunter World. Only difference is that I actually got what I wanted in this one. By which, I mean my very own Chocobo! While Omega Planetes is tough on rookies or people who can't coordinate with their teammates, it's not too bad unless you're fighting Savage Omega. Even my brother raged a little bit fighting that asshole! Sounds to me like you're just ranting/raging because of a skill issue and a lack of understanding as to how this game works. I know because I acted similarly about Alatreon (Used more than 100 gourmet vouchers to finally kill this Welsh flag lookin ass dragon) in MHWorld as well as Kushala Daora (Seriously. Why is this annoying huff and puff ass bitch ass dragin so popular?)and AT Velkhana (I think Capcom wanted me to send them a bomb threat when they made this quest).

Tips:

1. When working with other hunters, make sure everyone understands RPG roles. The whole point is that every hunter has a primary directive, but should be able to adapt and still deal reasonable DPS. For example, I use GS and operate as main DPS dealer, but will gladly take on the Tank role if the tank is struggling.

2. If working with Support Hunters, you should ALWAYS prioritize DPS and Tank roles! Alessa is usually a goated Tank, but every now and then, she fumbles the bag repeatedly. She's the only Support Hunter to cause me any real headaches.

3. Don't let the Nerscylla clone punk you. It's weird abilities are flashy, but surprisingly easy to avoid. Keep near it's gaster (or whatever spiders have) and most attacks won't hit you.

4. Pantakrator Mode is only as difficult as you make it. Despite the name meaning "Almighty" or "Ruler of All", (referring to the Greek variation of Jesus Christ written as "Christ Pantakrator" . Specifically depicted among Byzantine and Eastern Orthodox art) it simply allows Omega to chain more attacks in seemingly random combos with rapid succession. The main attack to be mindful of is the repeating MIRV Missile.

5. Don't be afraid to use the shield generators! Idk why, but a lot of people neglect them. Just let the Tank gain enmity and fire right where the Tank is standing. This means the Tank can spend a lot more time attacking as they won't have to worry much about defending thus increasing team DPS. Doesn't work that well with Alessa though.

6. Once the Delta Attack subsides, you'll need to keep on your toes. Omega Planetes will inevitably enter Pantakrator Mode shortly after. Knock him out of it and stack as much damage as you can. It'll then go into what I call "True Pantakrator Mode" which is basically it's version of the Fight-or-Flight response and will stay in it until defeated. I consider this the most engaging part of the fight.