Ok let me take a step back.
I believe that farmers are protected from competition by EU regulation. You believe that they are not.
In support of my opinion I have pointed out a case where imports of farm produce are effectively banned by high tariffs. If you don't think that this shields farmers from competition you might explain why.
You have pointed out the high level of market volatility faced by Irish Agri producers. I accept that this is true, but I do not understand how this shows that farmers are not protected from competition. I think that volatility arises from weather, changes in consumer taste, changes in output decisions by farmers and many other factors. We may no longer have wine lakes and butter mountains but we don't allow free import of agricultural produce.