I want to express my opinions
Why do you want to express your opinions?
I feel I need to be heard by someone.
It is good to listen to other peoples opinions. If you want to be heard you should also listen to others.
I can't. People who I work with are doing things wrong and if I don't talk about it, I feel horrible.
It sounds like you just need someone to talk to about work. Well I am here for you if you need to vent.