I Lost My Cheat, But My System Became the Ultimate Supercom

I've died three times across three different worlds. First time? Truck-kun while reading manga. Second? Used as meat shield. Third? Well its too shameful... no need to know. Fourth life, I finally got it right. Loving parents in a peaceful coastal town. No magic, no drama, just a normal life. Then the "pirates" came. They slaughtered everyone. Captured children....and things happened. I escaped. Found an ancient inheritance in a dimensional cave. Woke up alone on a deserted island with a voice in my head: [System Activated] Except this System is a sarcastic bastard that charges 200% interest, gives me nothing for free, and just dropped a bomb: "You have 5-6 years before they arrive." Who's "they"? It won't say. So now I'm building a pirate crew from broken people like me. Our mission: survive whatever's coming. AND DOMINATE THE WORLD....... MUHAHAHAHAHAHAHA........