The only type of hate was coming from his fans and was geared towards the editorial that made him that way. Those who previously didn't like the character had no reason to hate him anymore since the people in charge seemed to share their sentiments. Not only was he no longer "in the way", but he was changed beyond recognition. They could not take a bigger dump on the character if they tried.
Well of course, because he was "in the way" again. Whoever serves as the "point man" of a legacy franchise is bound to get the same reactions. Kyle did take some getting used to initially and John got similar reactions from Hal and Kyle fans when both were shafted for his sake on the show. Hal has been in that position longer than any of the other Lanterns, hence the hate for him seems to be more continuous. The longer he stays where he's at, those types of reactions will remain the same. It's not like the people who don't like him would suddenly change their mind about him, regardless of who writes him or in what capacity. As long as Hal has a prominent presence in the DCU, his naysayers would just keep frothing at the mouth. And that's fine, it's been amusing if nothing else.