fixed for you. Objectively implies an objective standard, I'd love to know what an objective standard for judging managers would be (especially since modern thinking seems to be that a manager has a marginal impact on wins). I don't even like baker, but the reaction against him is ridiculously overblown
Black was a 15 year starter who won over 100 games, he was thought of as one of the best pitching coaches in the MLB when he was with the 2002 Angels (who defeated Baker's giants thanks to a major pitching gaffe by Baker), and his teams pitched amongst the best on the road during San Diego's most talented years. Let's not joke around, the man knows pitching.
As for objective standard, it's pretty simple. It's mathematically measured. Look it up sometime if you don't believe me, read some of Tom Tango's stuff. The most important thing for a batter to do is just to not get out, no matter how. "OBP" is the definition of not getting out - it's getting on. Baker has gone on record for not valuing OBP, not valuing walks unless the runner is fast. Michael A Taylor will bat leadoff ever day, or at least maybe until Turner gets called up, just because he's a stealing threat despite the fact he can hardly get on base to save his life.
Baker loves bunts, which are a waste of precious outs (not just a modern thought, see one of the greatest of all time Earl Weaver). In all but the rarest of situations do you actually bunt. Baker is also known to be stiff about bullpen roles. It's inefficiency, you don't save your best bullet for an arbitrary lineup at a certain time, you use it against the toughest competition.
This is mathematically, proven, objectively bad strategy. Matt Williams used steroids, but ironically, Dusty Baker is Matt Williams on steroids.