Thanks for airing your opinion. Readers are welcome to voice their views regarding their feelings pertaining to a similar situation and how they feel about receiving advice. Much depends on the manner whereby the advice is delivered, the way people react to the advice, and the confidence level of the advice’s recipients. In general, I agree with your opinion that people do not like to receive advice that they haven’t sought. In fact, the Gemara states that you should never give musar to someone whom you know with certainty will not accept it. In this case, however, I do not believe that this was clear.
Thanks again for your letter and I wish you hatzlachah!