You got this! You rule! I know, I know. It has been a long road getting here. But this is your last obstacle to overcome. You can practically see the finish line from here! Just imagine the relief you will experience after you submit your thesis. Think of the massive amount of free time! And while you know this does not have to be your opus magnum, you know you want to be proud of your writing. Once this is published by the university, it will be searchable! And it will remain among the battlefield archive for years. Decades, even, if Willard's thesis is any example. People will be mispronouncing your last name in association with your research for a very long time.
You know this is just a dip in the road. Shake it off, water off of a duck's back. Remember that bad is never good until worse happens. And this ain' that bad. Just a few more months, really only a few more weeks left of this. Pull up your bootstraps and overcome this mental obstacle. You got this.