I think it more depends on the amount of complaining, the topic, and the connection to it, if any.
Saying "I can't find my teaspoon" once or twice isn't bad. When you complain for hours about it, then that's a little extreme. However, if it's the last thing you had from your grandma, it's still overboard, but a little more understandable.
As far as the misspelled word, it depends. If it's obvious that the person is doing it on purpose (like spelling it correctly and then misspelling it later), then it can get annoying. However, I've had days where I can't type and people jump on you before you get a chance to correct it. I was trying to type cheetah for a game of online pictionary and typed cheatah, then cheeetah, and then finally got out cheetah. A few people said that I needed to learn how to spell despite the fact I did get it spelled correctly and was trying to type it faster than the rest of the players, which obviously can cause you to misspell things.
I kinda get annoyed personally if people correct others. My friend would send letters to her mother telling her about how school is going. She would get back the same letter, with red markings on it, telling her how to correct the errors in her letter. After seeing those letters, unless a post is unreadable, I feel the person deserves a break.