How Cartoon Network Ruined The Ending of Justice League

For the most part, a lot of the DCAU is looked back on as some of the best superhero content ever made by DC Comics. The one-two punch of Justice League and Justice League Unlimited produced some of the best superhero animation that the small screen has ever seen. Though after a move to Cartoon Network, things went downhill pretty fast for The Justice League. But how exactly did Cartoon Network ruin the ending of The Justice League?