I've lived in King County for 20 years. Yes, taxes have been going up a crazy amount, so have our needs, so have our home values. But what did they do to screw us over?
I don't live in Seattle, I feel reasonably well treated. I do hate that they are spending so much public money on the baseball stadium, but that's not making me feel that terrible. I used to live in unincorporated king county - did you know that there are tons of places that have septic tanks, even well settled neighborhoods have them, because they didn't extend the county sewer lines that far.
On your second article, I'm not sure what your point is about the tribes vs Washington state.
https://crosscut.com/2018/04/salmon-tribes-should-beat-washi...
And just try getting a building permit in unincorporated king county.
King county apparently exists for either Seattle, or anyone but King County citizens.