Kate hasn't been nearly as bad as she could be. Besides, we all know Chad & Abby will be getting back together eventually, so whatever hounding she has done won't matter in the end. Chad isn't like Lucas, he's not going to let Kate ruin his love life. As for Abby, if you're going to fake your death and hang out in an attic while your "widowed" husband develops feelings for someone else, well then don't be mad because he needed time to resolve his feelings for the Gabi.
Not to mention he was honest about his feelings instead of cheating on her behind her back. Abby didn't fight for Chad or her marriage. Chad was willing to do the work to repair their marriage. He begged and pleaded, but Abby chose to walk out and push him into Gabi's arms. And if she was so insecure, she needed to get professional help instead of running to Dario.
Not to mention he was honest about his feelings instead of cheating on her behind her back. Abby didn't fight for Chad or her marriage. Chad was willing to do the work to repair their marriage. He begged and pleaded, but Abby chose to walk out and push him into Gabi's arms. And if she was so insecure, she needed to get professional help instead of running to Dario.