I've read both posts on the (two) threads you started. I'll try to answer both here.
To answer your question simply; no, I don't think anyone who hasn't been brought up in the Taiwanese culture will ever truly understand Taiwanese women. They may say they do. It may look like they do. But they don't.
Some time ago I met a Taiwanese girl in the UK. Long story short, we're married and have a child. As I'd lived for many years in SE Asia I thought I had a very clear understanding of all Asian cultures. I was wrong.
As a Westerner, I approach almost every aspect of life in a fundamentally different way to you. SE Asian cultures, having recent exposure to the West via our chums the French, have lost some of the cultural niceties that make Taiwanese so... well... impossible to understand.
I could easily write a 10,000 word thesis on the cultural differences between us and only scratch the surface, so there's no point in me going into detail. The bottom line is quite simple; I will never really understand where a Taiwanese person is coming from nor, I suspect, will a Taiwanese person ever understand me. The best you can hope for is mutual acceptance that differences exist. Trying to change either yourself or your (potential) partner is fraught with difficulty and likely to end in tears.
My wife and I are very different people. We acknowledge this and simply get on with our lives together, accepting that things between us will never flow easily. Fortunately, we both enjoy the challenge.
In your case, 'G' has indicated to you, fairly clearly, that you've overstepped his boundaries. You have suggested that his behaviour towards you doesn't meet your expectations. Why are you pursuing this relationship? Stop wasting your time. Walk away, learn the lesson and move on with your life.
In conclusion, you make a very valid point. If both parties clearly stated, from the beginning, their expectations for a relationship ranging from, 'You're hot and I just want to have wild sex with you'
to, 'I really like you and I want to see where we can take this relationship'
life would be a lot simpler. Perhaps you'd like to try being open - from the beginning - with your next partner?
Wishing you the very best of luck
PS. I do realise that - as you're a Taiwanese woman - non of the above will make any sense to you at all.