Help

I need some motivation. I love my novel but I don’t think the characters have anything to them it’s my first real novel and I used ai to write a few chapters and if I’m publishing it I know I can’t do that I’m thinking of just starting from scratch and rewriting the whole thing. Has anyone ever don’t this. Of course a lot of my writing is salvageable but I feel like the story just doesn’t make sense and it’s needs a new beginning middle end I took a break from writing and now coming back to it nothing makes sense. Don’t get me wrong I’m super proud of myself for writing 60k words and I could just go back and edit everything but I just don’t feel like what I’ve been writing works with the book. So can I just start from scratch?