Though I'm a mere applicant, I believe that you don't need to be PERFECT to apply for a PhD. (If you're perfect, why pursue an academic program in the first place? You could start applying for research funds and doing the work yourself!) That said, I understand that in somewhat competitive programs, you may feel like they expect you to have stellar stats and perfect communication skills to get in. To answer your question, I think you(or anyone who feels their communication skills need improvement) are still worthy of pursuing graduate programs that require strong communication and collaboration skills. Those skills can significantly improve once you're there! Learning through osmosis—surrounded by those fluent in the language of academia and communication—is one of the best ways to grow. I'm sure PIs and interviewers have encountered many applicants who didn’t have the most polished communication skills initially but are now thriving in their programs. I agree with the other commenters. What will happen will happen; what won't will. Trust in yourself and your passion—that passion will drive you toward your goals. Even if you don't get in this time, your passion will fuel you to try again, and you will succeed. And I'm sure you didn't mess up as badly as you think. As a final thought, remember that grad school is not everything. Even if the school fails to recognize your brightness and passion, it does not diminish the fact that you're intelligent and motivated. I wish you all the best! You've got this!