I guess the owner is just looking for someone with the impossible skill of getting along with the Chief Flight Instructor (ask anyone in the Philippines).
Not replying to applicant who has taken the time to travel 9,000 miles to do an interview and a full medical check in Taiwan is bad protocol and is telling a lot about the professionalism of this company.
You may also want to check with the (many) local employees who have already resigned from this company to have a better insight on this: accountant manager, mechanic, office assistant, instructors