I've seen people call themselves "senior" after 3 years on the job, other become CTOs in the same time, and others still have a senior title after 20(!) years in the industry yet have a fuckton of technical experience.
I've heard that they are all just titles and opinions from "if you don't have the technical skill you can't call yourself a senior", to "senior and staff are just a feeling, principal is the actual senior" and "staff? above senior? we call that manager".
What's your story? Is there a ladder? Do you feel like you belong on it? Where are you on it? Does it make sense? Did you see major bumps in salary? Did titles count at all?
Same. I can't remember where I read it, but the theory why silicon valley companies succeeded is because the role of managers was to clear the way for technical teams / the technical division. The latter were given the freedom to explore and produce results. It feels like most companies come from the old school of "managers control, other execute" and believe success is due to their decisions.
Sounds like it's time to dust off the CV. Good luck