I think it's very likely that he has done a very deliberate about turn in his comedy and the tone of his output since his new career as an author took off. I haven't read any of his books (and don't intend to give him either the money or the headspace) but a quick glance at Amazon reveals plaudits from other authors and media reviewers include 'brimful of tenderness and compassion', 'charming and tender', 'observant', 'perceptive', 'full of heart and humanity' etc etc.
I think it would be very difficult to build that brand while appearing on Friday night tv doing his old schtick of snidey sniggering like a year 9 playground bully, and mocking and revelling in the humiliation of (mostly) young women. Looking back at that clip (shared upthread) of him laying into Britney Spears when she was having her very public breakdown, making much comic mileage over how unattractive her shaved head was, then showing a full-screen paparazzi upskirt shot of her getting out of a car and pointing out that it matched her genitals seems almost shocking now and shows his subtle but total shift.
He would be the unpleasant character in any novel - nasty and spiteful, seizing the slip-ups and flaws of others and cruelly amplifying them for laughs. Hard to present himself as capable of tenderness, compassion, heart or humanity while maintaining a lucrative career doing that every single week on prime time TV. I am certain not wanting to have evidence of his past bullying dragged into the sunlight on twitter is the reason for his hasty exit, under cover of a 'be kind' disguise.
But we've seen it. We know. He can rebrand the packaging but the ingredients are still the same.