Hi Ali,
I work next door to you but don't find non-compliance with instructions so bad here. Having said that, we have awful problems with people either not listening at all or listening but not comprehending/reading back. I don't mind if the radio's hard to hear and pilot's tell me that, but don't come back half a dozen times with variations of clearances I've issued without a good excuse. These days, we haven't got time for that nonsense.
I also have the dubious privilege of sitting next to controllers who issue less-than-stellar instructions and you can hear the deafening silence of our pilot bretheren who are completely underwhelmed by such clearances, so I can well understand the view from the other side of the radar screen.
On another note, as a matter of professional pride, I have to point out that every controller should spell separation correctly; after all, it is what we're paid to provide!
