I don't know what they do think. I can only guess but it's quite clear they are not satisfied and I am certain that they are not the only ones, perhaps only the loudest.
Such is life. Anyway it's obvious that ERC is not in a good shape and not all the unsatisfied speak loud. Don't foreget that rallies like Ypres or Barum are part of the Eurosport game since the beginning and they know how it changed through the years. There used to be times when they gave a lot less but received a lot more.
It's up to them to find how to attract the competitors. They clearly didn't succeed.