Is 'fuck' really so bad? It's not a 'bad' word (Well, it is, and people like your boss might not like it) it's just a strong word to show that you feel strongly about something
A point about contractions: It's better and more natural to use contractions in English, however, in Joffrey's case here:
Or in Bill Clinton's case in the 1990s: "I did..not...have...sexual relations with that woman".
To NOT use contractions makes the sentence sound stronger, perhaps more formal, and it has been said by language experts that people tend to not use contractions when they're lying, perhaps to try and sound more convincing! So... remember to use your contractions!