It seems that the response to the feedback is somewhat immature. The feedback started by saying how the good things worked. Having then raised some issues by suggestion (which had been asked for) you may not agree with all that was suggested, but there is no reason to tell the respondent to take his aircraft and leave!
If they genuinely wanted feedback ( and not fishing for compliments) they should expect that some of the feedback will raise issues of which they hadn't thought.
Time to grow up gents and treat your customers with respect.