Table is an easy word to pronounce. In French, a syllable like table embedded in a longer word cannot be pronounced differently. In English pronunciation, there is no table in comfortable. The correct pronunciation is ˈkʌmftəb(ə)l (the ˈ shows where the main stress of the word falls).
This is closer to the word “bull” than the word “table”. There are only 3 syllables. And yes, it would make it easier if we spelt the word “comf ter bull”
Check the pronunciation here:
https://dictionary.cambridge.org/dictionary/english/comfortable
We also have a problem with “tain”. “Captain” is pronounced more like Cap ten, as is mountain and curtain, whereas contain, detain, maintain, pertain and sustain are all pronounced to rhyme with train.