To be fair, if you poke a cell with sugars, amino acids, vitamin C, and all sorts of other essential nutrients you'll also see signs of oxidative stress, neurotoxicity, reproductive toxicity, carcinogenicity, and altered metabolism. In some ways it's the counterpart of "bullets cure cancer in a petri dish."

Plastics are still probably bad (with a prior that most synthetic chemicals we're exposed to are known to be toxic and not "proven" to be so and actually banned for 20-100 years), but a cellular study showing that plastics damage those cells isn't very convincing on its own.

Your linked study is a little broader, but it mostly summarizes studies with grandiose ideas or those summarizing those sorts of "poke a cell and find it doesn't like being poked" experiments I initially derided.