Why don't you just not listen if you don't like it. Jim Hawthorne does fine but I am sure you could do a much better job juggling at least two sports at once nad traveling between cities to call first then the other.
So why does he just not do baseball? He's admitted that it's his least favorite, and it's by far the sport he's worst at. He's just objectively terrible at it. He's not bad at basketball at all, and I don't really care about what he does with football because I'm either in the stadium for home games or watching road games on TV.
There is no reason at all for him to be doing baseball anymore. It's a disservice to the fans.