Alex Karev’s exit

I have a deeply unpopular opinion about this, but I feel like it was the best exit for his character. I don’t think it diminished his development at all. He was always going to do everything he could to be the best father possible. He wouldn’t have left if it was just about Izzie. And it’s not like we could expect Justin to stay on forever. It was a well written exit. I don’t understand why people hated it so much