It's not that they didn't value you, it's that you made an agreement to sell your services at a given price. If you no longer like the agreement let them know.

It's not that they didn't value you, it's that you made an agreement to sell your services at a given price. If you no longer like the agreement let them know. Anyone worth working for won't have hard feelings that you've decided you're worth more. Labor is part of a market where people get to decide how much their labor is worth. Take full advantage of that, as employers certainly will.