There is nothing easier than to thoughtlessly heaping negative critique on other people, is there. There is a multitude of wisdom in proverbs and quotes: “A fool is made more of a fool, when their mouth is more open than their mind.” , “Great people talk about ideas, average people talk about themselves, and small people talk about others”, and "Speech is silver, silence is golden" especially when one is prone to reveal more about oneself than one maybe should. As always, it is better to choose to be nice. It would have cost you nothing to simply state that you were not impressed, but there is something much, much bigger at stake here: If we let ourselves get away with reacting in the manner you did, it does not take long until we have created a habit. A habit that will turn us into a nastier version of the person we could be, and that, my friend, is a very high price to pay.