he had a right to be angry.everyone was doing what they thought was right and never even bothered to tell the the main person,the one who is at greater risk,harry.he had a right to know and was excluded from knowing about the order he had to hide in his aunt's plants to try to get to find out news on anything unuasl and isn't right and pretty unfair.i give thumbs up for being so angry i would be that sour also.