I would disagree with the term 'worthless' especially in the context of applying it to all the premed faculty with a broad brush. Some are better than others. What you have to keep in mind with the premedical program, as well as the medical program itself (from what I've heard), is that a lot of it rests on you. Read your texts, assigned or not. Do all your work, take notes and review them. Following this process you will do well and end up learning a lot. Teachers may fail you, but remember, you are your best teacher - take advantage of that.

I personally think that none of the premedical teachers are all that bad, (now I'm speaking of Aruba here and not Bonaire), and a couple are actually quite good.

The purpose of premed isn't to grant you a degree, it's to prepare you for the study of medicine. If your intent is to study medicine elsewhere, then you should definitely do the premed elsewhere as well, however. Premedical courses at Xavier have little transferability. Once you get into the medical program though, transfer becomes a possibility, albeit a slim one. If you want to get into medicine, are hardworking, dedicated and a self-starter, then Xavier is for you. If you're looking for a premedical degree, or think you might want to study some years here and some somewhere else, then I'd caution you to think again.

I myself am a visual learner primarily, meaning that I can get by with subpar teaching. Once again though, the premed teachers are so-so, not 'worthless'.