So, as the title says it, I had a DM tell me I wasn't worth much, so I proved them wrong.
I worked for an auto parts store and was patient enough to wait an extra 3 months for my review, promotion, and raise. I finally got my review after my DM told me I couldn't go find another job that would actually pay me $15 or $18 dollars to start.
At this point, I was making $11.50 an hour after 2 years and a 25-cent raise with a forced raise by another manager who stepped in and gave the whole store a raise.
My boss refused to catch up and do reviews for any of the employees so I went above him and straight to the DM whom I thought was a good guy, turns out he didn't really care much either.
I finally got my raise and promotion, but not after I gave my notice 3 months after my review with no word of whether or not I even had it.
DM said I couldn't find any job that would pay my asking dollar amount at entry level, effectively saying I'm not worth it, so I proved them all wrong and found a great job making considerably more than what I was even asking.
The point is, if anyone tells you that you aren't worth what you know you are, prove them all wrong and go get the income you deserve. These are the hours of our lives we're trading for the ability to survive and live a decent, comfortable life, not struggling to just barely not be homeless.
Go get the money, prove everyone wrong, and succeed.