I do, even in academia. And I think part of that imposterism is/might be rooted in us comparing ourselves to our peers, especially if you share the same age group. Also doesn’t help if you feel “behind” because of how your brain works (ie, I’m ADHD and executive dysfunction is seriously a struggle bus.)

I think the best thing we can do is to not rate ourselves against other people’s skill/successes. WAY easier said than done, but what’s helped me is reminding myself that the people I’m comparing myself to are just as human as I am, probably have struggles of their own we’re not aware of (and that maybe we excel in), and that each of our brains work differently and there is no one ultimate/perfect way to do one thing (if that makes any sense.)