More search terms leading people to my blog, from the last week alone:
"I hate academia" (this one is very popular).
how to work in academia without the guilt killing you
"quit graduate school"
"how to get a job outside academia"
"make you leave" academia
grad school guilt
"10 good reasons to leave academia"
I'll keep posting these from time to time, as a reminder of the fact that you are not alone.
Just because no one publicly talks about these doubts or about the negative aspects of academia doesn't mean that you're the only one who notices or feels them.