The vast majority of microplastics aren’t deliveberaly introduced into products, but come from breakdown of “everyday” plastics. When you wash your polyester shirts, for instance. Or when your plastic containers are “recycled”.
Your characterization of having the entire world stop using plastics “immediately” is a strawman. We had decades. The amount of plastic has only grown, while R&D into non-biodegradable alternatives doesn’t get mych funding by comparison. The suggested solution is to have governments fund a UBI with Pigovian taxes. We can’t even pass this: https://csas.earth.columbia.edu/sites/default/files/content/...
We the People should be angry, since we and our children will have to live with the consequences of this dysfunction and inaction, and increase in production and consumption of these things which externalize the cost, thanks to the profit motive. The list of things in that third link goes way beyond plastics. This is how our system works. Ours is an environmentallh irresponsible generstion living on an ecological credit card. The individuals are distracted from banding together to vote in governments that will pass a Pigovian Tax and Dividend on an increasing number of negative externalities. It requires a political movement, and anger is a great motivator and uniting force.
In that third link, I list all the narratives individuals are told, in order to take focus away for governments and corporations, and onto shaming individuals into performing individual action downstream of the actual problem.