Sadly, Finals19, there are malcontents in every profession.
I cannot remember having really any problem with CC, as I told the CC supervisor the usual (flight time, altitide, enroute wx etc) and then added....'if you have any problem, use the interphone and let be know, and I will try and solve it'.
Simple as that.
You would really be surprised at the co-operation received.
Works like a charm.