Chris Berman is indeed a cringe factory but he wouldn't even crack the top ten if I were to list reasons why I can't watch ESPN.
Berman is terrible, yes -- I don't even watch the NFL, not to mention ESPN, and I still cannot get away from him, between the Weight Watchers ads and now one for some anti-Weight Watcher restaurant chain. And as bad as Berman has become on the pre-game show (he is a walking, talking definition of someone who has become a caricature of himself), he should never, EVER, be let loose near a baseball broadcasting booth, ever again. The Cosell connection to Berman, for me, is that Berman broadcasting basbeall reminds me a lot of when Cosell bullied his way onto the ABC Monday Night Baseball announcing team, back in the late 1970s. That was horrific.
I remember back when ESPN first went on the air. They were so programming poor, they continually showed stuff like college lacross and seniors tennis, and -- I swear -- New Jersey high school football. The unique thing was Sportscenter, thirty minutes devoted to (national) sports only (the local news gave sports 3-4 minutes, typically.) Berman was a part of that, and as I recall there was a time when his schtick didn't seem so hackneyed. Albeit, that was 30 years ago.
He can at least say he has been there since the beginning. You always knew you were likely to get Berman and his 'Boomer' persona when you switched to ESPN, for better or worse. The people I blame for fucking up Sportscenter are some of the ones who came later -- Stuart Scott, Dan Patrick, Keith Olbermann, Kenny Mayne -- those who created an environment where every talking head on the show was trying to one-up the others with smart-ass comments and "signature phrases."
You can point to the beginning of the end for Sportscenter as an engaging "hard" sports show once that ethos became the norm, and people like Stuart Scott felt it was okay to run around saying "Boo-ya" or whatever the fuck it is he is known for..