He was a perfectionist and an asshole; you can be a perfectionist without being an asshole. It's hard to overcome the fact that employees mostly aren't interested in perfection (with good reason--it's not like most of the benefits of perfection accrue to them). But perfection is valuable. When you've got something that is the product of dozens of groups' work, everyone letting one or two things slide because it'd be a lot more work to fix them can mean a pretty compromised end result.