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I circled the areas that were too uniform or plain. My main point is that your map is made up of rectangles instead of zigzags and splotches. In nature, theings are splotchy and irregular, canyon walls wind and twist.... this one... is manmade looking.
Your mapping skills are better suited to cities and inside places. You see... I also have qualms with Nintendo's maps. They are always too square or rectangular... too uniform. If you want to see good maps, check out the game Ether Saga. Now THOSE maps are good. Admittedly, they are 3d, but that doesn't make a difference to idealists like me. I know you can do better with the tools at hand.