The fatal flaw of perfectionism is never being truly happy or satisfied, despite accomplishing so many things. striving can also make you blind to everything else in your life that may be important but isn't what the striving or the perfectionism is focused on. So beyond never being satisfied and potentially neglecting other things that bring you purpose, in your life and your career. The third fatal flaw of perfectionists is that it can make you reactive and feel attached to things happening in a certain way, and if they don't happen that way, you're not able to handle it.