In American English, it is common to pronounce it something like “comf-ter-ble” in most dialects. Some dialects of e.g. British English pronounce it as you would expect from the spelling with 4 syllables. I can’t think of an American dialect that pronounces it correctly. Perhaps some New England or Canadian dialects do?
My experience traveling around the English speaking world is that it is very forgiving of pronunciation. What trips you up is differences in vocabulary and semantics. You have to learn a new dictionary and a bit of inexplicable grammar everywhere you travel. I’ve learned very different languages that had similar relationships to adjacent languages; the words are all familiar but the meanings of those words have been remapped to something else. English tends toward a similar pattern.
My experience traveling around the English speaking world is that it is very forgiving of pronunciation. What trips you up is differences in vocabulary and semantics. You have to learn a new dictionary and a bit of inexplicable grammar everywhere you travel. I’ve learned very different languages that had similar relationships to adjacent languages; the words are all familiar but the meanings of those words have been remapped to something else. English tends toward a similar pattern.