It's never good enough, so you get sucked so far into the details that you become frustrated.
Even when your goal is complete and results in success, you believe you could and should have done it better.

Not Celebrating Your Success

Even if you have a clear goal of what perfection means, obsessively pursuing it is a sign of insecurity. 
And insecurity, when not addressed directly, doesn’t go away because a concrete objective has been achieved, it manifests itself into self-criticism or a new overvalued goal.

Pursuing Perfection, But Never Feeling Perfect

Perfectionists are afraid of judgment. They often want to be seen as being effortlessly perfect.

Pretending Everything Is Perfect

When presented with an opportunity that requires new skills or moving outside of your comfort zone, you're likely to turn it down. You're afraid to not be good enough to tackle a new learning curve and to be seen as a failure or a disappointment.

Avoiding Challenges That May Lead To Failure

You may get things done, but you are in a constant battle with the decisions and motivation to complete certain things. The "what ifs" and expectation of a negative consequence or result preoccupies you and the pressure can be overwhelming.

Struggling With Getting Things Done

Perfectionists cope well in a low-stress environment. Outside of that, anxiety often increases, which offers the illusion that nothing is going well, thereby decreasing life satisfaction.

Life Doesn't Satisfy You

Instead of forgiving and viewing mistakes as a learning opportunity, you criticize and put pressure on yourself for not predicting a less than perfect outcome. You feel inadequate, and these feelings preoccupy your mind, often to the point of losing productivity.

Not Allowing Yourself To Fail

Personality and positive qualities like honesty, compassion, humor, etc. , aren't what perfectionists believe people will like about them.
It's not enough to be a wonderful person, you must be a perfectly wonderful person. You don't allow others to see your flaws and most likely you talk about your achievements, but never your failures.

Likeability and Being Perfect

People often confuse high achieving behavior with perfectionistic behavior. High achievers are dedicated, determined individuals who have a strong desire to accomplish something that's important to them. Their achievements are not about what others will think of them or a fear of failure, it's to gain personal gratification from their success.

Pretending Everything Is Perfect

Similar ideas to Pretending Everything Is Perfect

Perfectionism: The Quest To Feel Perfect

Perfectionism: The Good

Other-oriented perfectionism