There is of course, the obvious reason, that my vote being 1 out of roughly 200 million it is completely insignificant
No, the reason voting sucks is a more personal one. Let us say, hypothetically, that a college-aged individual who has had a friend from a foreign country, we'll say Japan, stay with him for two weeks awoke at 5:30 AM to drive said friend to the airport. And let us also assume this individual did not receive enough sleep and is feeling under the weather. So after dropping his Japanese friend at the airport, the individual sees that by the time he gets back home, the polls will be open. So being an upstanding citizen who cares about the future of this country, he makes his way to his specified polling location.
Now it's just after 7 AM when our hypothetical subject arrives, so a line has already formed. This slightly upsets our man, because he had intended on getting a little more sleep before going to work. Nevertheless, he exits his car and lines up. Let it be known that our individual is in no means rude, and if someone asks him a question directly he will answer with a polite, albeit short, response. But what becomes unnecessary is the woman 2 spots in front of our subject, who laughs after everything she says, and the man 5 spots ahead, who feels it is perfectly normal to interject his opinion or witty one-liner into every one's conversation within a fifteen meter radius.
Generally when you have the phrase "laughs at whatever he/she says", it is understood that this person never says anything funny.
So to sum it up, voting sucks because the people one is forced to stand in line with are idiots who can't just keep quiet and move forward in silence. Hypothetically speaking of course.