So I’m not really clear on why some users disconnect from approach/departure when I give them instructions they dont like? For example I instructed a user requesting ILS 28R at KSFO coming from heading 140 to turn 330 decend and maintain 5000 and they just say unable and disconnect. They had a good 20-25 nm at least. Another asked for FL380 before even clearing runway 1R at SFO and I Instructed to climb and maintain 10000. They said unable and disconnected. When I sent on guard they reconnected I asked them to stay on the frequency when they once again asked for FL380 by that time they had cleared the airspace so I approved it but still irritating.
Just wondering what can be done about this. I give pretty clear vectoring instructions in an appropriate manner. I wont deny a reasonable request unless it disrupts traffic or compromises the safety of other aircraft in the area or it goes directly against regulations.
I just need to know that I’m not doing something wrong here but if I am please I’d love to be better always.