- have you tried reaching out to your alumni network or the career development person at the bootcamp?
- what has feedback been about your interviews? if it's "we're looking for someone more senior", ask them what are the traits of a senior person and work towards that
- if you're focused on Javascript, do you know the latest frameworks kids are discussing? Angular/React/Vue? And while it's awesome you picked up Haskell, can you write RxJS?
- in terms of interview prep, you've know the answers to explaining .this, closures, class instantiation, async right? And how are your "tell me about yourself", "time when things were difficult" stories? Confident? Engaging?
I don't think you need to go back to school. Perhaps the market is flooded with bootcamp grads and now it's how do you differentiate yourself. Better portfolio site, stronger Github presence with good readmes. And like thegandhi says, sometimes it's out of your control. Some companies really just want fresh grads with 3.8 GPAs.
Also, take a week off from job hunting or even thinking about the internet. Go out camping, be out in nature, and reset.