It's not that bootcamp is better - it's that bootcamp resembles what you're most likely to see on the real thing a lot better. There's a huge disconnect (in my opinion) between destroyer GC/OC and bootcamp. Destroyer is a lot more calculation based, while bootcamp is a lot more concept based. The calculations on bootcamp are simple - but if you don't know the concept - then you won't be able to do the calculations. If you're weak in chemistry, then yes, I would suggest you work a little with destroyer. I just want to give you a heads up that some of those questions on destroyer are ridiculous. I'm a chemistry major and i know for a fact that some of that stuff on destroyer is way out of the scope of general chemistry. Bootcamp asks a lot more standardized questions. The DAT is a standardized test, so it's good to get the proper exposure to that kind of strange "standardized" wording that you'll encounter on the real thing. If you're weak in GC and OC, I totally forgot to mention Chad in the above post. Chad is obviously the #1 source for chemistry. Make sure you learn/write EVERYTHING that he says, do well on his quizzes, then switch gears to bootcamp and you should ok 🙂
If you're really really really weak in chemistry and if you think you'll sleep better at night if you do destroyer, then go for it. But it just depends on your comfort level with chemistry (and your budget). It might be a pain in the butt for you but I'm sure you'll get through it. If you work Chad's, then destroyer, then bootcamp (in that order), you should be in very good shape with both GC and OC. But like I said, it all depends on how strong you are in these areas of chemistry.
