Your paycheck is the compliment and that's all your self worth should require outside of your own self assessment. (Wow this started to get philosophical quick).
That's a start. What missguided thinking would suggest otherwise?
But that doesn't mean, that you are valuable (able to provide value) to someone else.
However, the point about self worth, I like to make is: self worth starts with you - based on experience, and obviously supported by a feedback loop you gain confidence in what you're good at, and what not.
So, the best way to gain self worth is by gaining confidence, is by gaining experience.
I draw the line at excessive rumination when someone does NOT provide that external validation or criticizes me outright.