What could be the main themes in 'at the end of all things harry potter fanfiction'?

I don’t own or clam to own the rights of Harry Potter or this fanfic I am just copying and pasting from a site and posting them here nothing more and nothing less. The reason I am posting this fanfic is because I have seen people post the exact same one could not finish the story. I have already copied all the chapter an will release them in batches.

The emaciated old man with an alien-like appearance grinned maliciously, while the young girl cried and howled. "Worm, worm, worm, worm, worm, worm..." Countless worms surged towards the girl like a tide, seemingly intent on devouring her completely. The girl instinctively closed her eyes and let out a desperate wail. "Someone... save me!" A breathtaking beam of light cut through the dimness, dispelling the girl's fear and the swarm of worms that filled her vision. Accompanied by a voice that was young but carried a hint of sunshine. "It's okay, I'm here. Big brother is here to protect you." The boy with purple hair and purple eyes held a scythe in his hand, blocking in front of the girl, and issued a declaration of death to the old man. "You deserve to die, Zouken Matou. No, Makiri Zolgen!" BONUS CHAPTER: 500 PS= 10 Chapter Advanced Chapter in: patreon.com/AbsoluteCode https://discord.gg/9zUZj5ksxM

" Many heroes emerge in the world of sports, but on the field, I am the king" *This is a translation

[A Harry Potter Fanfic] In this Harry Potter fanfic, a young man is reborn into the wizarding world. After graduating from Hogwarts, he adopts a hidden persona to explore the underground world of British wizarding society while supporting the orphanage where he grew up through commissions. However he returns to Hogwarts accepting a commission with uncertain motives. ********************************************** *The Wizarding World and all its wonderful witches & wizards belong to J.K. Rowling, Author of Harry Potter Series.* ********************************************** I don't own the picture in the novel cover, if there's some problems contact me in reviews section, I will take it down. ********************************************** I will post some Extra Chapters in patreon, you can check it out. >> patreon.com/FicFrenzy

[Welcome to the Type-Moon System! We offer our most sincere blessings to you, our user. As a beginner, you’ll receive our initial care—a single free draw with a guaranteed five-star. Additionally, you'll enjoy a beginner’s privilege: a guaranteed strategy draw (up to three stars) until your beginner phase ends. Moreover, if you decide to become a player now, you'll receive a pocket dimension for storing your items. You'll also be granted special transmigration privileges, letting you experience what it's like to be the protagonist. So, what do you say? Are you interested in joining?] The boy sitting in front of the computer made up his mind and pressed the "Confirm" button. At that moment, his consciousness froze, and a black hole appeared before him, swallowing him whole. In the dimly lit room, the computer screen still glowed, displaying an unsettling line of text, as if it had snared its next victim. [Welcome to join us.] Fan translation of 我在地错当主 by 黑夜福音

[Current world: Danmachi] (PS: I'll change this every time the MC moves worlds since it's a crossover fanfic.) As for the synopsis? Reincarnated and traveling to another world, Eiji Seiya initially thought the world was normal. That was what he thought before he met the heroine and protagonist of the franchise he had watched in his previous life. Not only that, after he awakened the Inner Voice System to grow strong by complaining about plot, heroine and protagonist in his heart to get many rewards. He is determined to increase his power so that he can save his home world, the world where he was reincarnated that was hit by the disaster "Honkai" and save beautiful girls like Kiana, Mai, Bronya, Rita and others who had tragic endings in the original works! "I will save them all!" However... Everything went smoothly... Eiji earned rewards every time he changed the plot in another franchise. It's just that... What's wrong with these heroines? Lala Satalin Deviluke who was supposed to be engaged to the protagonist instead became his fiancée. Sona Sitri suddenly called him to the student council office and said she wanted to make a deal with him. Rias Gremory who was supposed to ask the protagonist for help to solve her political marriage problem with Riser Phenex inexplicably came to him. The girls were disgusted at the protagonists of their respective franchises. Something was wrong here! Not only that, heroines like Kotegawa Yui, Sairenji Haruna, Akeno Himejima, Kuroka, Serafall Leviathan, Grayfia Lucifuge, Sakurajima Mai, Ai Hoshino, Kasumigaoka Utaha, Erica Blandelli and others... They like him! All the super beautiful and sexy women that many men in the world covet surround him and leave their respective protagonists. In the world of Danmachi: Freya is not crazy about Bell, but crazy about him. Hestia is indecisive. Demeter provides support, he no longer has to worry about not having rice or vegetables for his family. Eiji who saw all this was dumbfounded. At first he was confused as to why these heroines were surrounding him, but gradually he realized and knew that it was all happening because ... His inner voice! - The plot that has been changed by the MC: 1. To Love Ru: 100% 2. Danmachi: 5,2% 3. Highschool DxD: 99% 4. Campione: 33% 5. Fate: 58,8% 6. Genshin Impact: 15,4% 7. Seishun Buta Yarou: 90% 8. Oshi no Ko: 100% 9. Saekano: 98% 10. Oregairu: 97% 11. Shinmai Maou no Testament: 100% 12. Mieruko-chan: 100% 13. Trinity Seven: 100% 14. The Legendary Mechanic: 46% 15. Oresuki: 75% 16. Food Wars: 70% 17. Rent-A-Girlfriend: 90% 18. The World God Only Knows: 90% 19. Nisekoi: 80% 20. The Quintessential Quintuplets: 46% 21. Rāmen Daisuki Koizumi-san: 100% 22. Dandadan: 24% 23. My Dress-Up Darling: 81% 24. Amagi Brilliant Park: 96% 25: Danjoru: 32% 26: Junior Highschool DxD: —— 27: Slash Dog: 54% 28: Kaguya-sama Love Is War: 72% This is the plot change process of the latest chapter and will change as the story progresses. By the way, the grammar at the beginning is bad and will improve as the chapter progresses. However, my writing style will not change much because this is an inner voice novel, which means that there will be many reactions from each character. Oh and in chapter hundreds there will be a group chat to prevent the loss of interaction between the heroines. It's a special chat group for the heroines in the MC's harem. - Get the latest chapters faster on my patreon. Support me on patreon to keep me motivated to write more chapters: www.patreon.com/DogLicker