I shouldn't have got my PhD. I have published 5 papers in Q1 journals. But that has been possible because the topic is hot right now and much rigor is not required for publishing.
I can use an open source or commercial software without knowing how it works in detail and churn out papers. I am just pushing some buttons in a black box and getting results.
I can't teach the numerical method behind the software or the mathematics involved because I never understood it. Other students who work on this field take courses and have thorough understanding of the subject. They go on to teach the subject. While I am poor in mathematics, I am just dumb and lazy to self study it, solve examples.
I am publishing papers now at a decent rate, but I am lacking depth. I am not suitable for my field of research. I don't know if I can do anything about it now.
I recently got a PhD and searching for postdoc positions. I just don't fit anywhere. Everyone wants someone who is expert in the theory or have strong mathematics background. I have neither.
I shouldn't have got my PhD. I think, my advisor, committee and university just wanted to get rid of me.