> If the workers are screwed, they will stop working for doordash, increasing the costs to doordash and therefore speeding up their demise

Not if they can't find other work (like now where un-employment is high).

You or I might have to privilege to choose our next jobs but for some people especially those in the services industry don’t have that and end up having to work doordash/instacart. Don’t attack the messenger when it’s probably easier for most people to stop using doordash.

Given that we arent going to be convincing others to tip or not to tip, id argue by not tipping you are not "part of a movement trying to take down doordash" but just being cheap (if in the US where there is a culture for this)