Making a sale doesn't make one successful. It is thrilling to feel that rush of a sale, that someone likes something you made. But, that does't make one successful. It is very, very rare to be an overnight success. For most successful businesses, it takes planning, organizing, testing, failing and learning from that failure, practicing, perfecting and time. I don't think anyone is being rude. Anyone who can remember their first sale will pat you on the back and congratulate you. However, when something is done to potentially harm a shaky market you should expect a small amount of harshness. I'm sure that a knee-jerk reaction is to be defensive of your actions, but maybe if you cut through the defensiveness and listened to the advice wrapped in harshness it will make some sense.