Every game there's one level in the campaign either you or the majority of the world don't like. Either it doesn't match up to the rest of the campaign, or the level is just a hassle to get through because of flood. Your reasons are your reasons.
So lets discuss(take a random guess) at what level will suck or be annoying. Keep it between level 1-10 and if you can magically come up with a reason for your thought process give that too.