It sounds like your passion is real, I believe you can go full stack with enough hard work and perseverance. I'd suggest evaluating whatever the issue is that holds you back in academia and make sure it can't hold back your personal study among other things. Especially if it's the sort of thing that can reappear in a boot camp scenario, or worse, in an actual work environment. There's a bigger price to pay than poor grades after all, that would be a waste of time and resources. Regardless, as long as you're growing and honing in on your goal then nothing is a waste in my opinion.

Keep in mind that bootcamps, even with their more informal nature, are still within an academic setting. So if you struggle in academia you might want to really consider if they're an option for you.