The duality of code optimization in its natural habitat! Your average developer writes 500 lines of functional-but-not-fancy code and gets a perfectly adequate little house that does the job. Meanwhile, some YouTube tutorial guru accomplishes the same task in 50 lines and creates an architectural masterpiece that makes your code look like it was drawn with crayons.
It's that special feeling when you watch a 10-minute tutorial and suddenly realize your entire codebase is the programming equivalent of a child's stick figure drawing. Nothing quite boosts your impostor syndrome like watching someone solve your week-long problem with a one-liner while casually mentioning "this is just a simple solution."