BSD,
Hurn, 135.05, is notorious for frequency congestion, even when split. The airspace will be re-sectorised next year so will hopefully solve some of it's problems (ATCO's may be able to offer views here.....!)
I suggest you DO file an ASR. There is no record of your concern otherwise. I have filed several, indeed 2 this summer for RT congestion.
Both LACC and LTCC controllers are excellent, I believe that due investigation of such occurances are a positive move for both sides of the industry, and should hopefully not be treated as a complaint.
30W