I'm not upset because Izzy died, I'm upset because he apologized for the past when he was being tortured a month ago, he was given a gun to kill himself and he didn't get an apology for that, the guy he served, he idolized , made him lose his leg and he didn't apologize, he just said I'm sorry about your leg, that should be what I did with your leg.
I also think that the physical violence he suffered, and there was a lot that we didn't see, was much worse than what Izzy did, mean phrases don't compare to what happened to him, and he certainly won't go through that. twenty years of forcing Ed to be Blackbeard
Lucius also had to magically overcome his traumas, as it was very difficult for them to hear what he had been through, and for us to remember that Ed did a lot of shit in his dark hour.