My omelettes always become scrambled egg. What am I doing wrong? !?

You are probably not letting the egg mixture set properly.
Once you pour it onto the pan, lower the heat and let it set without touching it.

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Put the egg mixture in a pan and do not touch it, then finish off under the grill. Bob's your uncle, one full omellette coming up.

wish i could show you - it would take forever to describe preparing a proper french omelette in text - basically you need to start w/ a real hot pan - just short of butter burning temp - have your fillings ready beforehand - pour your eggies in the pan and you pull the cooked egg towars the center of the pan while tilting the pan to let the un-cooked egg fil in the spots - do that all over till all the egg is cooked - put your fillings on HALF the omelette - then let the omellette slide out on the plate folding it over the fillings with the PAN as you plate it -- need a good non-stick pan, well greased w/ cheap butter - UMMMMM i love making and eating omelettes - try gravelox, goat cheese, and bacon - UMMMMMM

don't stir the egg once it is in the pan. let the bottom begin to solidify and then with a spatula, turn the whole thing over.

Cooking for the wrong person.
Find someone who likes scrambled egg, and they will think the world of you :-)

Cover the bottom of the pan w/ the eggs and let it settle. Add ingredients and flip. One side needs a crust, stop stirring so much.

Don't touch it till at least a minute passes-pull the middle to the side and fill with your filling of chioce or just fold