Look there is value in persistence but at the same time you need the wisdom to change when needed.
Doing the same things will give you the same results most times.
Want different result, do different things.
hence my suggestion to pivot to clean up your head. Can't suggest specifically unless the details are known.
Having said that, this is the normal life of a founder and I would also go through similar emotions at some point of time.
So yes, you are right, I am doing a more strict office schedule than when I was working for other people. I hope this will pay out some day.