I never thought I'd see the day that Vapp +3 or 4kts becomes a point of contention, or the accuracy level required to adjust the descent path by ~ 25fpm.
Not trying to defend the ol' chap, but 42 years of experience should bring him to around his 60s. Old farts do, what old farts do. As long as it doesn't impact flight safety, just roll with the punches.
If his "techcedures" offend you, then ask him about it. If his explanations don't satisfy you, then file a report with your local flight safety department.