I was at your position. I dragged on a journal and my thesis for 2 years. My advisor literally begged me to get my dissertation done at times. He complained I was a perfectionist and told me all good advice you have here every month for those two years. It didn't work.

Eventually, he told me "How about you ``take leave`` and write whatever and bring it to me". I took one week leave, stayed at home and start writing. Somehow, I finished my first thesis draft in a month after that then I graduated. Those two years was the lowest years in my life emotionally.

I don't have any advice for you because every person is different. This is a battle you need to fight by yourself. Start writing!