I was born in a country that has islands and I live in a different country that consists exclusively of islands. The islands spread out thousands of miles in various directions. Land being far apart is just a reality of how countries work.

The distance from London to Gibraltar is closer than the distance from London to Bermuda, but nobody finds that weird. France has French Polynesia on the opposite side of the world. Russia has Kaliningrad. Norway has Svalbard. South Africa has another country, Lesotho, right in the middle of it. India wraps around Bangladesh like a tentacle. Azerbaijan has a random piece of land and makes a sandwich out of Armenia. Spain has islands directly west of Morocco. France has land on South America.

The whole world has freaky borders. The only clean borders are places like Wyoming and Colorado.

I would add natural navigation barriers such as rivers and lakes (and some, but not all, mountain ranges) to the list of "clean" borders. They're not straight lines, but they're a natural place to site a border.