lets be honest - most jobs get boring from time to time
It's rare to get an exciting every day kind of job
I have been retired for five years now. I worked for over 31 years for NASA in the Space Shuttle Program in one form or another. It was very exciting in the early days since I would get to work with new and unique hardware and get to meet and work with very smart and interesting people. Early on, there were all these exciting plans like rescuing Skylab before it burned in the atmosphere, going back to the Moon and then Mars. None of that happened during my time due to lack of money and vision.
Still, keeping the Shuttle flying over the years was challenging enough since there was always something new to learn (about things that could go wrong) or something old that broke and we had to figure out how to fix it since the technology had gotten so old.
However, the last three or four years were no fun at all. Even though we were still flying the Space Shuttle, the priority of our efforts were supposed to be spent on the planning of future space programs and vehicles, all of which got eventually cancelled. A lot of people were not working on their jobs, instead, they were working on their careers. Our upper management was leading by example.
I don't think that NASA will ever design and build another space vehicle. The brains, the will and the spirit are gone. They will probably have to hire somebody like Elon Musk with SpaceX to get anywhere.
In the mean time, I continue to learn how to fix my mini and figure out what will break next....