So basically to sum up what you just said -
He's about the most unprofessional person ever seen on TV, or in fact - in life....
I agree.
A talk show host should ask pertinent questions, then let his guests be judged on his/her answers by the audience watching - not him.... otherwise he might as well just ask them round to his house for a chat...
Or are people who watch this guy not interested in what the guests have to say?