If you want a list of quotes by Kevin Kelly, I'm sure they are just a Google search away. Sometimes, the reader has to do a little work - in this case, to determine what 'Flounder' means. Perhaps it means just that, which is to fumble around awkwardly, kinda like a fish out of water? It's kind of a murky word, and we don't really know how to use it in a sentence. It actually matches the whole tone of the article pretty well, especially when the author talks about how they may have made a huge mistake with their career by bouncing around and trying whatever seems interesting.