Please don't let it knock your confidence. I had a similar experience on a bfr in Florida. My biggest regret is that I let it eat away at me and I refused to get back in a plane for the next 9 months. Thank god I eventually did. It took just one person to nearly ruin the one hobby I had strived for and worked hard for. How dare he?!!
There are quite a number of tossers out there. Just bin the club and find another. Put it down to experience, you'll eventually regain your confidence.