Hi,
not familiar with the the training ATC get in Indonesia but i have been flying into Jakarta most months for almost 7 years now, and overall its not too bad.
Even though its mentioned on the ATIS, i have never received a clearance from the delivery frequency, but that could well be due to the early morning departure times we have.
Often cleared for take off by the ground controller, no big deal but not a common occurrence elsewhere in the world.
Blatant preference to the local carriers resulting in excessive vectoring and fuel burn, frustrating, but thats life. Once as a bit of fun had to remind them that our destination was CGK, attempt at humour lost on the controller and he then turned us towards the airfield, happy days.
Rgds.