Extremely displeased with the way the boss talks.

Was having a parasitic draw issue. Running voltage was 13+. Usually was 14. The boss say I sinkalan. Went home and fixed the problem myself. Running at 14v again. According to him 14 is "too high". Yeah right my 3 VWs, Subaru, 2 saga all running at 14. He said 14 battery will boil over. I've been fixing my own car for years and AFAIK 15v then yes it's too much. Lousy knowledge and service. Won't be back.