I have mixed feelings tbh. On the one hand, sure, Coca Cola and co manufacture the plastic in the first place. On the other, consumers buy them and discard the packaging inappropriately OR the place they live in does not have adequate trash infrastructure in place.

Plastic waste is not a problem if it's handled correctly is what I'm saying. In big chunks of europe you pay a deposit for even small plastic bottles nowadays, to be returned if you (or someone else) returns it to a collection point from where it's (theoretically) disposed of properly. If it ends up in general waste or the environment, that deposit is theoretically used for its cleanup.