I've never gone for a PhD, so I can't relate to the experience of this simulation, but found this game was actually really easy.
I completed my PhD in 4 years and 11 months, which feels quite reasonable. My "hope" never dropped below 45, and by the end, hope was 76.
If anything, this simulation just made me think getting a PhD would be a fun opportunity to do a lot of study, and didn't put me off at all.
EDIT: Why downvote? haha I'm just sharing my experience.