Emphasis not just in the narrow sense of showing intense emotion, but rather the general concept of giving a sentence rhythm and prosody, often to highlight a wry or ironic situation. Your analysis is correct that GP likely did not do it entirely to invite readers to get annoyed on their behalf, but rather to humourously focus on the contrast between the arduity of setting up and waiting for a dual-boot on one hand, and playing a "f*cking game" on the other.

> There are many better ways of calling attention

Written expression is a form of art, not a formula with a correct answer.