Here's the corrected version with only grammar and spelling fixed:
Current Location: The Last Sanctuary of Humanity
As the last human continues to fight for his life, in the center of the sanctuary, surrounded by broken buildings and destroyed homes covered in the blood and flesh of his enemies, he screams, "Blood Blast! Hahaha!" Raindrops begin to touch his dried skin, washing off the blood from his body.
"Finally, it's raining again! It's been so long since the last time I had a drink. Ahhaa, how long have I been fighting? I lost count after entering the second year of this. Absorb, control, throw, and repeat. Absorb, control, throw, and repeat! Every single second, every minute, hour, day, and year. I'm tired. What am I even fighting for? Everyone is already dead. No one else is alive. I'm the last human alive in this apocalyptic world."
Looking at his former companions, now mindless zombies, memories flood his mind—the time they had spent hunting zombies, adventuring outside the sanctuary for supplies, and returning with everyone's expectations resting on them. Yet, he doesn't flinch. His emotions remain unchanged as he continues this meaningless fight.
Time continues to move without stopping: 7 months later.
As the last zombie drops at his feet, he can finally rest, knowing not a single threat remains to harm him. He has survived all these years, all alone, relying solely on his own strength. He walks to the nearest wall to rest his back after everything. Looking at the corpses of everyone he had known and spent years with, he uses the last of his strength to speak to them one final time.
"Look at you all, turned into something you hated, feared, and avoided all these years. If only you had put at least 10 percent of the effort I did all these years, maybe—maybe you'd still be alive today. Haaa, I'm losing my vision already. Makes sense. Without zombies to absorb energy from, I can't live much longer… raindrops?"
"Hahaha, so this is how I meet my end in this world. No, this is how this world ends. To think this is how everything started. I can still remember the day when this world turned into this piece of shit! Back then, everyone thought it was just another normal rain. To think it would cause all of this."
"What am I even doing now? I'm going crazy. I should just rest after all of this—not like anyone is hearing me at all. Goodbye, you cruel apocalyptic world. And sorry if I let you die just like that."
ALL REQUIREMENTS HAVE BEEN MET.
THE SYSTEM HAS BEEN AWAKENED.
SEARCHING FOR THE SURVIVORS OF THE RAIN…
NUMBER OF SURVIVORS: ???
AN UPDATE IS REQUIRED.
UPDATING THE SYSTEM…
THE SYSTEM HAS BEEN UPDATED!
WARNING!
CURRENT NUMBER OF SURVIVORS: 1
"Wait… one? How? How did the system just arrive in this world? Wait, how long has this world been abandoned?"
"Janna!!! Come here now!"
"Yes, my goddess… What can I do for you?"
"Come here, my little angel…"
"Yes, goddess… What is it that you need me for?"
"Nothing much, but [Authority] Chain of Fate. Now that you can't run away from me, let me ask you this question: when did I ask you to put a system in this world? Hmm? When?"
"System? World? Wasn't it yesterday, my goddess?"
"That's right—yesterday! And let me ask you this again: what's the time difference between here and that world?"
"... Wait, goddess, I can explain!"
"Explain? Explain WHAT? Look at this mess (world)! There's only one survivor left. Not only that—he's already on his deathbed! Did I not teach you that if there's an abandoned world, you put a system on it as fast as you can to help the remaining survivors?"
"..."
"Huhhh! Making him into a regressor won't even compensate for his suffering all these years. There's only one thing I can do for him, and that is to make him reborn in one of my worlds… But before that, let's see his status first."
STATUS
Name: Raven S. Senangelo
Race: Human
Gender: Male
Nationality: Filipino
Ability: Blood Manipulation (Absorption) (Blast) (Harden) (Explosion) (Purity)
Rank: 12
Title: Blood Emperor
"Quite an amazing status... Also, Rank 12? In this world, for every 1,000 cores you consume, it's equivalent to 1 rank. So this one has consumed and defeated over 12,000 of them… That's just the ones he cultivated. These last 9 years of fighting, after everyone else turned to zombies, he managed to kill all 2.4 million zombies without stopping at all."
"Wow, he did all of that without giving up, my goddess? And without the help of a system at all?"
"Shut up, Janna. I'm not allowing you to talk at all. But still, it's sad that he did all of that just to die like this… If only a specific angel had done her job..."
"..."
"Well, not much we can do. Since the system only got to this world now, I can't change much. Well then, should I do this now?"
THE GODDESS OF MERCY HAS DESCENDED TO THE MORTAL WORLD.
"What's that noise? Why does it sound like one of those system notifications I used to read so much back then? Also… a bit late, don't you think? Everyone is already dead."
A GODDESS IS STANDING IN FRONT OF YOU.
"A goddess? That's so… I'm sorry, goddess, if I cannot give you a proper greeting. As you can see, I'm currently dying..."
"WORRY NOT, CHILD. I'M NOT HERE TO MAKE YOU A BELIEVER BUT TO GIVE YOU A CHOICE…"
"What kind of choice are we talking about then?"
"WILL YOU GIVE ME THIS WORLD AS MY OWN IN EXCHANGE FOR MAKING YOU REBORN IN ONE OF MY WORLDS? BY TAKING THIS WORLD AS MINE, I CAN CLAIM THIS UNIVERSE AND GIVE THOSE WHO DIED A CHANCE TO BE REBORN."
"What part of that is a choice… But there's nothing much I can do right now. So YES, my goddess, I shall give you this world in exchange for giving everyone a chance to be reborn under your care. So please make sure that those I truly cared for are reborn as humans under your care."
"OF COURSE. I'LL MAKE SURE OF IT. NOW, I SHALL REBIRTH YOU…"
"... What's wrong now… Goddess?"
"CHILD, IS THERE ANYTHING ELSE YOU WANT?"
"Nothing at all."
"ALL RIGHT THEN. PLEASE ENJOY YOUR NEW LIFE IN THIS WORLD OF MINE."
"I shall, then…"
"With that, I now have the power to control everything in this universe. Janna, make sure you do your job right this time."
"Yes, my goddess."