@simrin-- No, shirataki noodles are not meant to be boiled at all, but I do think that they are best in soups and stew like foods because there is more water for them to soak up.
If you made a thick sauce for the pasta, I'm guessing that the noodles didn't have much to absorb and it probably didn't taste too good without the flavors it would normally be infused with if it were in a soup.
Next time, try rinsing the noodles (very quickly) with hot or warm water and make a more watery pasta sauce. Let the noodles sit in the sauce for a while so that it can soak it up.
By the way, which kind of shirataki noodles did you use? I have friends who love shirataki but hate tofu shirataki. You should try some other varieties because you might like those more. There is also shirataki noodle dumplings which are really good.