If you like 80% of your chosen career and wish to improve 20%, does it not make sense to speak out about the 20%?
Else, how would we ever improve working conditions anywhere? I don't think that is going to happen externally.
What would you do?
If I decided that low pay doesn't bother me, I definitely wouldn't complain. My choices are entirely in my hands. Additionally, I could (and I actually do, btw) teach privately for a much better pay, scrapping any reason to complain.