Critiques are two-way. It is not just one person providing critical feedback, but rather the designer articulating the rationale for their decisions (why they made the choices that they did) and the critic responding to those judgements. The critic might also provide their own counter-judgements to understand the designer’s rationale further.
I have to agree with professor Ko that good critique is a conversation over a single opinion. I've been in situations such as group project in my other INFO classes where people can simply say that that looks good or "I think you should fix that small..." without having proper reasoning. ALso the article mention the hamburger rule as it's not just about being nice, but about giving feedback that will help people or project grow. This reminded me that giving critical feedback is important and that also helping the other grow, Personally, I am very much open to critical feedback as long as the reasoning is good!