Remember, different perspectives can give different impressions to the same event.
Left: "You" message = The message describes how "you" are.
Right: "I" message = The message describes how "I" felt.
From Person B's point of view, the "You" message can be perceived negatively: "I'm not that fast at doing my work... Is she flattering me?"
However, the "I" message is subjective and can't be denied. It will be easier for Person B to accept the message.
Along with the "Detailed tips for posts", the takeaway is to use "subjective" expressions in your posts.