“When I disagree with another member’s input, I don’t state: I disagree with (name of member), proceeding to criticize the other member’s input. Instead, I offer my sincere input independently of other members’ input.”

When the other member’s input is harsh, judgmental and unhelpful, that needs calling out.

“I suggest you do the same.”

Suggest all you want, if I believe another member is in the wrong I will say so for the sake of the original poster. They are often very vulnerable people. You give a lot of advice on here, much of it good, but sometimes you are way off beam.