Also:
Camping - either sweaty and smelly or freezing cold, no toilets, bugs, dirt, horrible sleeping arrangements and crap food
Festivals - can only be enjoyed if pissed/ on drugs. Otherwise awful
Big families - nightmare, someone is always unhappy, hard to organise/ always someone's birthday/ anniversary/ marriage/ funeral, takes all your time to keep up with.
Having a lot of friends - same issue, so much time and effort to keep up with all of them, someone always falls out, politics and moods...