That's another thing i hate about this show they're constantly killing people i like but then apparently i have to deal with that whiny loser priest for the entirety of the rest of the show???

Everyone who read the comics and knew that scene was coming:

Robert Kirkman did say he wished he didn't go so far with the Governor so early in the series because it made writing subsequent villains more difficult. So when he got to Negan, he knew he had to do something serious since it was going to be a longer story arc.