You know, apples and oranges. You live your own life, with your own challenges and strengths. Comparing to others who have different circumstances can easily lead to doubting yourself.
You might've grown up with negative messaging about yourself. Unfortunately, your brain adapts to that and can keep on doubting you, even as a grownup.
Perfectionism sets an unrealistic high bar for ANYTHING. Meaning, you'll disappoint yourself constantly, leading to self doubt.
A generally negative mindset will lead you to doubt anything. Yourself, people around you, anything.
Fortunately, all of the common causes of self doubt are behaviors and habits. This means, you can change them. Don't let your self doubt tell you otherwise!
Build Real Confidence by taking the class below by Mel Robbins! You'll get practical, actionable advice on beating impostor syndrome and leaving your irrational fears behind.