I try to avoid added sugar in food because I am a cantankerous malcontent. And I do not appreciate sweet tastes. That said, I have never found the food in Vietnamese or Chinese restaurants too sweet.
If you have burnt the sugar to the extent that it lends a bad taste to the dish, I fear that you can’t really do anything about it. In general, if you burn something in a pot or pan, the first thing to do is transfer the unburnt food to another pot or pan so that the whole thing does not take on the burnt taste.
