Think there are two issues at play worth commenting on

1.) Do Malaysian men feel emasculated by professional woman? Some obviously do. But you can't control that. Unless you quit your job and act like a bimbo. But this leads to my next point

2.) Are you just dating the wrong men? Why would you date someone who would never see you as an equal? I would just go on a bunch of first dates. Tell them your occupation before it gets any further to reduce search costs. Why dont you just date another doctor? Surely that would just makes things easier. Then you can disqualify the doctor excuse when you are dating an equal.

Also, reading between the lines, it comes across that the doctor explanation feels like an easy and convenient excuse. I could be totally wrong because I hear your tone or see your face. But phrases like "Guys, are you that insecure?" and "that's why I dumped him." makes it sound like you are just a very strong woman in general, perhaps too strong. Relationships are give and take. Unfortunately, for woman, you have to "give" more than you take. And when I mean give, it is emotionally.