RE: At what point should I give up

If the job no longer makes you happy, it is time for a change, and to answer your question about how people can stay with a job doing the same for so long, the word you are looking for is (T-E-N-A-C-I-T-Y) It means the quality of being determined and persistent, refusing to give up despite challenges. It's the ability to remain firm and hold fast to a purpose, often used to describe someone who is resilient and works hard to achieve goals.
Good luck with whichever you choose.
!ALIVE
!LOL