As a full stack dev that wants to be backend: Fully agree with you there. Frontend is so much more of a pain for me than backend because so much of it just seems bad in terms of usability for no real reason.
On the frontend, the users control the execution environment. On the backend, developers control the execution environment. It had to be this way for the web to scale the way it did.
Most developers are control freaks. "I put in input, and the computer does what I say." Far more so than the general population, I think. That lack of control on the frontend will predictably not be looked on highly by many in our profession. I think those who are more comfortable having a more loose grip on their environment tend to be more comfortable with front end development—more accepting the state of how things are, not some elegant and provable state that can be verified to the nth degree.
We've molded and shaped our world in the backend to be as predictable and controllable as possible. Arguably, the frontend is more representative of the real world and its compromises.
