Lord of Elves: Every single border that is not on a river appears to be ridiculously smooth. I cannot see a single well-defined border on the map except for the river borders
For example, the border of Texas is wrong, and I wonder why it has changed like that; the border of Brazil needs some explaining: why is it so big? That Austria thing is practically square; the Italian border in the north is all curved, and therefore veers shy of the Alps. The border between Hungary and Poland looks like an arbitrary curve, as does the border between Alaska and Canada. Either draw a straight line or a topologically sensible border there. The border between Persia and Mesopotamia is fairly random too.
Also, you have boundaries along the Indus, the Loire, and the Elbe. These are valleys that are, and have always been, I think, the centres of cultures that have lived along both of them, and it makes no sense whatsoever to draw boundaries along those rivers. They do not form plausible natural boundaries for nation states. For example, just look at the Hundred Years War, and consider the fact that the Loire, despite being a huge river, did not at any point, IIRC, form the boundary between the English and the French. The fact is that these rivers are the centres, not the boundaries, of economic areas, and so they cannot conceivably be boundaries.