You seem pretty thin-skinned, so I am going to say this as concise and matter-of-factly as possible.

Someone offering you advice is neither harassment nor elitism. If they did so in a rude or condescending manner then fine, take issue with their bad attitude, not the fact that they gave advice. A mature person would at least consider if their suggestion(s) had merit without dismissing them out of hand, let alone jumping straight to taking offense.