>>1877317Anon, I...
I can see why you fucked up this badly; the line art means that the borders between colors is hard to judge. What you should do is pick a consistent method, inside or outside of the lines, and stick with it for color borders, otherwise you get unsightly gaps and misalignment.
Your shading never lines up with the edges, I've spotted gaps EVERYWHERE. Did you do them as a separate thing after you finished the vector? You shouldn't eye the borders like that, you won't get it right. Honestly, if it's this bad I recommend just not doing shading until you get a better hang of it.
Your handling of the stripes is erratic, causing misalignment with every edge possible. They should flow along the edge as if they were a part of the sweater. Make the border, then using clipping masks or scissor tool to create the stripes later.