I think he's terrible, but again, it's a hard argument to win.
That said, for the people that don't want a managerial change (now or if things get really bad), what is it about Robin Ventura that makes him a good and qualified manager? It surprises me that he has so many people's support when all he's done is get hired for being the anti-Ozzie, blowing a division lead in 2012, and losing 188 games the last two seasons.
I cannot prove that Ventura is to blame for all of this, but if there was ever a manager to replace for the sake of replacing, Robin Ventura is that guy.