This. A thousand times.
At every company I've EVER worked for, I eventually had this exact same feeling. Even as the lead engineer, team lead, tech lead, or whatever other "top developer" role I've held, I always feel like this. And I always eventually quit too.
It's gotten worse in the past few years. I can barely make it one year before I feel like "just another dev", become completely de-motivated and start heading for the exits.
I've realized, at age 31, that I am a shitty employee and I always will be. I'm not supposed to work for other people. It doesn't really make me happy. It doesn't matter if its at a startup or a Big Co, I always feel like "just another dev", bored and ultimately like my potential is being cut short.
In the past year, this was sort of an epiphany for me. I have to follow the beat of my own drummer, be my own boss, make my own destiny. Will this bring me to self actualization? Will this be what I'm looking for? Or, will I feel empty once I get there? I have no clue, but I've got to find out.
Thanks for sharing your story, Loren. You're in good company. Good luck with figuring out what's important to you.