I did tell them. Multiple times and in very direct words. They told me I don’t understand nerds or open source.
Both marketing and CEO are jobs where Dunning-Kruger is considered an asset, not a problem.
I just had to scroll back up to double check what you said your job was, because I was sure you said you were in charge of software development, and then I thought, “no, I must be misremembering that, because there’s no way the CEO and marketing person could genuinely believe that they know more about open source software development than a software developer.” But no, you really did say your job was head of software development, and the CEO and marketing person really did think they know more than you.
The Dunning-Kruger effect is very real in marketing and executives.