SlimeSage
Lol, dont worry about the idiots wanting this to be a multiverse traveler FF, they are mainly the ones who want a “Pokémon gotta catch em all” type Mc. Just focus on what you wanna do and what you think you’d enjoy. If you think it should be short and sweet? Do it. If you want it long and savory, F them and just keep pushing broski 🤘
Your story, it's good, for you to want to quit just because of haters is showing your quitting mentality. Can you finish a fanfic of Solo Leveling or another popular story out there with that mentality? There's only one thing I can think I hate in your story, it is the romance. You already have short chapters and slow updates, but you still wasting chapters that takes time to update focusing on romance, romance that is not relevant to the progress of the story. That's why in shounen manga the romance is only a sub-plot and it came in the middle or later part of the story. If that's the problem then the solution is just to avoid romance in a meantime. I know it's hard to make a story but compare to light novels your 30 short chapters isn't gonna finish the first story arc so you can still change things to make it better. Just don't quit, you have a good story in your mind.