Why would He, it’s His universe, His rules, His plan. He knows everything that’s going to happen. Why be angry at something that is true to it’s nature?...besides, people have been saying the same thing you’re saying for a long, long time and probably will for a long, long time.
His plan, but we are created in His image and that image includes emotions. God gave us the Bible to study and know what His rules are. He specifically states things He hates and warns us of His wrath. He has not changed, and neither has man.