Paper straws were pushed by big corporate polluters to build a negative association with environmentalism.

Plastic straws are single-use plastics, but seem unexceptional by those standards. It's almost a meme that they're being singled out like they're the single greatest source of plastic waste, or uniquely damaging to ocean life.

On top of that, there are way better ways of reducing straw usage. I've used bioplastics that seemed way better. You could redesign the lids. You can do the plastic bag thing and charge people a nickel for a straw or whatever. Hell, you could just not give straws with every drink, and plenty of people will just drink from their cups and glasses. Instead, we get paper straws, something that is so obviously a bad idea it sounds like a joke, or a metaphor for a useless invention. Often served with cups and lids made entirely out of plastic.

So you get a bunch of people who have their drinks kind of ruined by a frustrating straw. It's a small thing, but it's just a little nudge away from environmentalism. You build an association with disappointment and inconvenience. Maybe it doesn't cause a big sway, but it makes people maybe a little more anti-environmentalist than they already were, or just less passionate about environmentalism.