Not talking the talk

It's been a thing with me... NOT talking the talk. People keep asking me why I don't speak out, when I should.... or why I don't make the right kind of noise.
Well, first, noise puts me off somehow. But, actually, it is more of a reticence to talk about the things that disturb me, depress me or disgust me. I even detest my inability to speak up, I do. To be honest, I hate when I feel the urge to talk about something that bothers me but I feel like I've already talked about it too much in the private... so I just hold it in.