I am guessing by the majoriy of posts here that I am in the minority as I don't see a 'Poor Keith' situation at all.
I think Keith does do what Kav accussed him of in that clip he has little digs but always with a smile or a laugh. He did it on last nights show to Alicia when she had revealed she didn't know her shapes. Keith said (with a smile) the only shapes you know are when you tell the Dr what shape you want your eyes with your next surgery

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Now I'm not a fan of Alicia but to me that was nasty. Then in that clip you hear Kavana say that Keith has been having 'little digs' at him since day one. Kavana behaved stupidly there which tbf is no surprise as I had heard how bad he got on The Big Reunion. But when you are trying to put that behind you and have somone drip drip dripping negatives at you on a daily basis eventually you will react.
Keith has done it with other hms as shown in the HLS.