I've lived here almost 40 years. In the past 15 years homelessness has risen by 50% but so has population. Rent has doubled, but crime is falling.
In fact, we're seeing record low property and violent crime rates. The last couple years have seen some uptick from the record lows of the 2010s, but Seattle is much safer than it was at basically any time in it's past.
I think that “record low of the 2010s” is the main driver of the perception that Seattle is declining. Many of us moved to Seattle in that era and the 2020s are dramatically worse than the 2010s.
In fact, we're seeing record low property and violent crime rates. The last couple years have seen some uptick from the record lows of the 2010s, but Seattle is much safer than it was at basically any time in it's past.
The statistics just don't back up your story.