EASA has every right to regulate the aviation industry in Europe. I don't see anything wrong banning non EU licensed pilots from operating within the EU, you couldn't get away with it driving a car so why should you flying an airplane.
This is nothing new and has been in the making for years. You are about 5 years too late to complain about it, and have long missed the consultation period for your comments, no need to bolt the stable door now the horse is long gone.
Why don't you try to operate a G-reg in the US for a few years with UK crew and see how long you will get away with that one before the FAA comes knocking on your door.
Count your blessings for being able to operate by means of a loophole for so long. This is long overdue.