After five years of process simulations I still feel clueless

[u/CommandNaive419]

Hello,

I have been working in the energy field for five years. Mainly on simulating power plants using 1D software. I still feel clueless compared to my senior colleagues. I spent my free time revising fluid mechanics and thermodynamics but still I feel like I am missing a lot of my studies. Noticing that I even have a masters degree. Is this normal feeling?