You shouldn't let it get to you. But if it was just one person then I doubt they meant it as a personal insult. Spelling errors don't make your work not worth reading, but they do make it difficult to read.
You also need to be aware that consistent poor spelling is in breach of the Mibba policies, and that can lead to you getting banned, etc.
You also need to be aware that consistent poor spelling is in breach of the Mibba policies, and that can lead to you getting banned, etc.
Just a friendly heads up.