First of all, congratulations on reaching the final stretch of your PhD journey! It's an impressive accomplishment to have completed your thesis despite facing numerous challenges along the way. Your determination and resilience are commendable.

I'm really sorry to hear about the difficulties you've faced with your supervisor and the hostile environment at your institute. Dealing with such circumstances, especially during a pandemic, can take a toll on anyone's mental health and wellbeing. Remember, it's essential to prioritize your own mental health and take care of yourself.

It's unfortunate that your supervisor hasn't been supportive, and their behavior is not acceptable. It's understandable that you may feel stuck and unsure about the next steps. It's crucial to consider what options are available to you.

In regards to roping in a co-supervisor, that might be a viable option to explore. A co-supervisor could offer guidance and support, which might help move things along. Additionally, discussing your situation with someone else in the academic community who knows your work and can vouch for your abilities may also be beneficial.

Regarding the possibility of submitting your work for a PhD by prior publication elsewhere, it's worth looking into. Many universities have different regulations and requirements, so it's essential to research the policies and see if it's a feasible option.

Regardless of the path you choose, don't let the actions of one person define your worth or your potential. Your accomplishments and dedication to your research speak for themselves.

or not, you have made significant strides in your academic journey, and that's something to be proud of.

Surround yourself with supportive peers, friends, and mentors who can uplift and encourage you during this challenging time. And remember, your mental health is of utmost importance, so don't hesitate to seek professional help or support if needed.

I wish you the best of luck in overcoming these obstacles and reaching a positive resolution for your graduation. No matter what happens, remember that you've come so far, and brighter days lie ahead. Keep pushing forward, and great things await you in your academic and personal life!