I've worked at two call centers, both anything below a 5/4 as a 0

In theory, sure. However in the real world there is no escaping neither the ratings or the gig economy. Every single delivery company here does it. When it is possible to choose the delivery I pick the postal service. They too asking for ratings, but at least they have regular employees though some delivery points that are stores and kiosks have a suspiciously high rotation of staff. Not every vendor uses the postal service and sometimes the only option is to order from them or be without.

I don't have any grandiose ideas of it having any effect, but I will not participate in rating the performance of my fellow humans that are service workers. They do the job to do the job and the job is not to suck up to me. And everybody has the right to have a bad day or whatever without some manager making it even worse.

Realistically it is better to support political parties that legislate wages and working conditions and such so that people working any jobs have a decent wage and are protected from abuse.