Married a Canadian, although I sympathise for all the bad luck you and your family had, I fail to see that any of the above was Zoom's fault or responsibility, and reason to condemn the airline. You may be in the industry, but fairly new and, with all due respect, fairly ignorant by the looks of things. No airline assumes responsibility for missed connections unless they have an interline agreement with the connecting carrier. No airline will accept responsibility for personal effects left on board the aircraft. All airlines reserve the right to change schedules (and this is in the small print), as did BA with me only a few weeks ago. Many pax fly with bags which are too flimsy for air travel (they will get thrown around a tad) and will find them damaged no matter which airline they travel on.
I have never travelled with Zoom, but I consider your reasons to avoid them as unfair and invalid.