Well, if you are 1.8 cm tall, than you are not taller than your insect friends that you take pictures of but joking aside, even with 180 cm, nobody would call you a giant here in my country, a lot of local girls and women are this tall or even taller so we are used to it :) But yeah, the tallest nation in the world are the Dutch, they are really big. But when it comes to individual ethnicities, the Maasai People may be the tallest. Their average height is more than 190 cm. I met some Maasai in Tanzania and they really were very tall. Thin but tall.

Good point about being muscular. It takes a lot of food to nurture the muscles so the big muscular guys usually suffer the most in the survival shows where there is not much food :D