If you look back and find the stuff Claire hasn't managed to get scrubbed, there are women who dated him long before he got with Katie who said he was a dick. In fact, one said they were surprised he got with Katie because he told them fake boobs are a turn off for him which proves he was using her just as much as she was him when they 'got together'. She wasn't the perfect wife, but he was a tit to her, yet no one seemed to care and decided he was the victim and if anything happened it was her own fault. Then when they split, he claimed to be the loving dad not interested in any other women and calling out her for moving on quickly but was having it away with people in secret including someone who did a kiss and tell. Then there are the red flags with Emily but for some reason, rather than admit he is a twit, Katie continues to get the blame.