The standard of RT on the VFR scene is indeed appalling but I don't think RT training is much to do with it.
The problem is that most people fly so rarely. If one flies 10 hours a year one will forget the RT but one will also forget what half the knobs and levers in the plane do...
Poor RT also comes from high workload - this much is often obvious when listening to the stuff on the air. Again, low currency. Perhaps also poor training but not poor RT training.
We could have the same debate on any other aspect of PPL flight, including instrument training. It hardly matters what you were taught 5 years ago. It is your currency on the type that determines just about everything.