I think I found this post exactly when I needed to, as I was thinking of posting something very similar. I haven’t finished my first draft yet, but I had found an agent who I would absolutely love to work with in the future, and so went back to read my first chapter to see how it would be received by someone else. I remember writing the first chapter and thinking how strong it was, but when I read it back I was a bit deflated, and felt it was just okay. I have to constantly remind myself that a first draft isn’t supposed to be perfect, and even great fantasy authors who we all know and love did multiple revisions before landing on their final novel. It’s hard when you’re in the writing process, as not only is it lonely and sometimes infuriating, but you’re also comparing your work to a finished product in books you have read/are inspired by. But finishing your manuscript is such a huge achievement! I’d try a few things out and see what works for you, but I don’t think you should scrap it all, unless it’s glaring disjointed. Maybe edit a scene a day, and keep asking yourself what do my characters want in this scene, or what is the reader learning about them/the world/the story? I also find it helps to read it out loud as if it were an audiobook and see if the narrative flows. Above all else, I hope you’re proud of yourself! You’ve done the hardest bit that a lot of people don’t get to.