I do feel for him in a way. I recently had a week long holiday booked after no breaks in a year and a half, and had to cut it short to 3 days due to things coming up. When you look forward to a break for a while and someone says no, not possibly anymore naturally you're going to be angry.
It's a tough situation because I'm sure everyone wants to respect cups but you have to look after players' health too, without making a stand all the different tournament organisers would just continue to throw more games in. The PL fixture list is already mad congested, over Christmas there were loads of injuries.