I cannot answer your question, but I have an idea for you: Before quitting, maybe try to get transferred to a different team and project? Maybe you just had ba

I cannot answer your question, but I have an idea for you: Before quitting, maybe try to get transferred to a different team and project? Maybe you just had bad luck with your team allocation. That said, if it's the same in all other teams, I'd totally quit as well; not having a sense of progress is devastating in the long term. (And made me quit science, btw).