I have some sympathy towards my fellow ATC's in India. I read recently that the Indian sub-continent has experienced the fastest growth in start up airlines and movements are increasing exponentially. Unless the regulator is managing this in a sensible fashion (doubtful) then it's left to the troops at the coal face to deal with it.
I deal with some of these airlines on a daily basis and generally find them 'ok' to work as I expect to repeat instructions two or tree times... perhaps it's my antipodian accent tho'...
I heard a funny story a while back from a mate in Muscat...
B777 cruising M.84 followed 11 minutes later by an A340 cruising M.83. Mumbai wouldn't accept this situation as the one with 4 engines was surely going to catch the one with 2 engines as it will go twice as fast!!
Hardly inspires confidence eh?