That said, there are plenty of options. Seattle has pretty reliable 5G coverage through T-Mobile who will sell you home internet now. CenturyLink fiber in some neighborhoods. Starlink. Yes the landline internet situation here is abysmal - parts of West Seattle are still on 512K DSL last I recall, but the point is you have options. Comcast isn't the only game in town anymore (and in fact is not the lone cable provider in all city neighborhoods).
Stop whining and climb up on the roof and mount an LTE antenna like people in rural communities do. Just hope your foot doesn't go through because the wood's probably all rotted in that mid-century bungalow you just spent $950k on. Comcast bad, whatever. I can't believe I'm taking their side on this.