I feel you. I've been there. It took me 9 years to finish. For several years, every Friday I was more depressed because I'd gotten nothing done that week.
To be honest, the only things that helped me were:
(1) stopping taking SSRIs. This was a big one for me. I didn't realize until afterwards what effect they had on the particular type of motivation that a PhD thesis requires.
(2) letting go, a bit, of my original thesis topic. I let my mind wander during a home improvement project and it led to an interesting question that was related but not identical to the original.
One thing I would say is -- don't beat yourself up about it being hard. A PhD is famously hard, and can be exponentially harder depending on your topic and advisor.
To be honest, the only things that helped me were:
(1) stopping taking SSRIs. This was a big one for me. I didn't realize until afterwards what effect they had on the particular type of motivation that a PhD thesis requires.
(2) letting go, a bit, of my original thesis topic. I let my mind wander during a home improvement project and it led to an interesting question that was related but not identical to the original.
One thing I would say is -- don't beat yourself up about it being hard. A PhD is famously hard, and can be exponentially harder depending on your topic and advisor.