Rare Affirmation From Walden:
You don't deserve to speak to yourself horribly. You aren't a lack of purpose, nor a waste of space. Everyone has their own purpose, and somebody who makes you think you're worthless is wrong. We all have a worth to our own cause, that may not be valuable to others. Who determines your "value" anyways?
Value is subjective. It's not "you" speaking to "yourself." When is the last time you actually listened to "yourself" instead of attempting to confirm to what others have shaped you into? Even in the silence, being alone, your mind is still trying to conform to the standards of others.
It's not you telling yourself all these bad things. It's the voices of others masked as "your" own. Maybe sometimes, look for your own voice and listen to yourself. The part of you that you haven't embraced in a while. Not the "you" that "you" act as.