I think you should change your job too.
I work in the same kind of company about 3 years.I spend all my enegy here, but got little return.
Right now, I know, as a chinese(especially from china), we can not work all my life in these kind of job.(even the pay is good).
When we suffering to some limit, we will lose everything.
I agree with your guys, keep working, and in the mean time, learn something related to your major, send resume.
keep working, keep learning, never give up.
You will be the winner.
no doubt, it is not worthy for you to stay in this company.
You'd better start looking around for other companies. This company is not worthy for you to work for, especially if you want to work for a company for a long time.
Your former co-worker is already an example for you. This will end with person's resignation, rather than the change in company.
It is good that you still have this job, so feel free to look around and you won't feel much pressure during the interview. No matter what output from the interview, you still have this job to get income.
So, keep this one, don't react to your managers too much (otherwise you might be fired), and start sending resume, arrage interviews. When ready to go, just say bye bye to them, if you don't want to say "fxck you guys asx hxle"...
我的经历:感觉受到了歧视却无法发泄