Over the years I have learned to not take this personally. Everyone is entitled to the expression of an opinion. If I heard the complaint in an environment that I could address it I would,mostly out of curiosity and information gathering purposes.
The “funniest” was when two women were talking to a third participant and they said “Sue’s really good and she has a really fit legs but her stomach is kind of big”…. Well, I was 7 months pregnant!