Earlier quoted context omitted.
Tell us more about your process. Omelettes are pretty basic stuff, so odds are if yours aren’t coming out reasonably well it’s because of a triviality taken for granted. Do you add your spices to the oil or the egg? Which spices?
The last one I made had only sauteed mushroom, jalapeno, goat cheese, salt, pepper, and eggs and I overcooked it. The pan was a non-stick pan and I used butter.
How did you cook the mushroom?