There is a big difference between mainstream Thai ladies and those you can meet in bars and nightclubs. What is often said about "Thai ladies" in general, actually applies only to [ex-]prostitutes, who seem to make up the majority of girlfriends and wives of foreigners, so don't believe everything you read and hear ... e.g., "Thai girls are unfaithful", or "Thai girls just want your money". Substitute the word "prostitute" for "girl" in those sentences and it makes more sense. If you're old enough to read this, and sophisticated enough to use Internet well, then you should be old enough to not believe everything you hear and read about Thai ladies and smart enough to think by yourself...
Likewise, it is incorrect to assume that all Thai ladies who have met a foreign man in the nightlife areas and developed a special relationship are tricking or unfaithful to the new boyfriend. It is true that most Thai nightlife ladies we investigate are unfaithful to or otherwise tricking the foreign boyfriend, but many are not. Many ladies in the nightlife area come to the point where they've experienced enough, and are ready to settle down into a more normal and stable lifestyle. Unfortunately, they are a minority in the nightlife areas. Nonetheless, bad news travels much further than good news, and many internet forums tend to be "agony aunt" sounding boards for venting anger and frustration.