I agree with you, except that I like criticism when it challenges my thoughts and gets me to improve. On the internet you're at risk of losing your job over things you said 10 years ago, or getting death threats from random strangers. Criticism is great when it's well thought out and well intended. When it's an opinion someone formed seconds ago based on an image or a news headline or an image of a news headline, there's probably nuance that they're missing and their angry response just makes things worse